diff --git a/Include/boolobject.h b/Include/boolobject.h
index cda6f89a99e..28068d1cbe5 100644
--- a/Include/boolobject.h
+++ b/Include/boolobject.h
@@ -15,8 +15,8 @@ PyAPI_DATA(PyTypeObject) PyBool_Type;
 Don't forget to apply Py_INCREF() when returning either!!! */
 
 /* Don't use these directly */
-PyAPI_DATA(struct _longobject) _Py_FalseStruct;
-PyAPI_DATA(struct _longobject) _Py_TrueStruct;
+PyAPI_DATA(PyLongObject) _Py_FalseStruct;
+PyAPI_DATA(PyLongObject) _Py_TrueStruct;
 
 /* Use these macros */
 #define Py_False ((PyObject *) &_Py_FalseStruct)
diff --git a/Include/cpython/abstract.h b/Include/cpython/abstract.h
index cf142b8a0bf..bdc0c49cd4c 100644
--- a/Include/cpython/abstract.h
+++ b/Include/cpython/abstract.h
@@ -133,7 +133,7 @@ PyAPI_FUNC(PyObject *) _PyObject_CallMethodId_SizeT(PyObject *obj,
 
 PyAPI_FUNC(PyObject *) _PyObject_CallMethodIdObjArgs(
     PyObject *obj,
-    struct _Py_Identifier *name,
+    _Py_Identifier *name,
     ...);
 
 static inline PyObject *
diff --git a/Include/cpython/descrobject.h b/Include/cpython/descrobject.h
index 5d6c3a24d95..e2ea1b9a2d3 100644
--- a/Include/cpython/descrobject.h
+++ b/Include/cpython/descrobject.h
@@ -43,7 +43,7 @@ typedef struct {
 
 typedef struct {
     PyDescr_COMMON;
-    struct PyMemberDef *d_member;
+    PyMemberDef *d_member;
 } PyMemberDescrObject;
 
 typedef struct {
diff --git a/Include/cpython/dictobject.h b/Include/cpython/dictobject.h
index d5119644c52..68b4593acf6 100644
--- a/Include/cpython/dictobject.h
+++ b/Include/cpython/dictobject.h
@@ -32,7 +32,7 @@ PyAPI_FUNC(PyObject *) _PyDict_GetItem_KnownHash(PyObject *mp, PyObject *key,
                                        Py_hash_t hash);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemWithError(PyObject *dp, PyObject *key);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
-                                                  struct _Py_Identifier *key);
+                                                  _Py_Identifier *key);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemStringWithError(PyObject *, const char *);
 PyAPI_FUNC(PyObject *) PyDict_SetDefault(
     PyObject *mp, PyObject *key, PyObject *defaultobj);
@@ -49,7 +49,7 @@ PyAPI_FUNC(int) _PyDict_Next(
 /* Get the number of items of a dictionary. */
 #define PyDict_GET_SIZE(mp)  (assert(PyDict_Check(mp)),((PyDictObject *)mp)->ma_used)
 PyAPI_FUNC(int) _PyDict_Contains_KnownHash(PyObject *, PyObject *, Py_hash_t);
-PyAPI_FUNC(int) _PyDict_ContainsId(PyObject *, struct _Py_Identifier *);
+PyAPI_FUNC(int) _PyDict_ContainsId(PyObject *, _Py_Identifier *);
 PyAPI_FUNC(PyObject *) _PyDict_NewPresized(Py_ssize_t minused);
 PyAPI_FUNC(void) _PyDict_MaybeUntrack(PyObject *mp);
 PyAPI_FUNC(int) _PyDict_HasOnlyStringKeys(PyObject *mp);
@@ -66,9 +66,9 @@ PyObject *_PyDict_FromKeys(PyObject *, PyObject *, PyObject *);
    argument is raised.
 */
 PyAPI_FUNC(int) _PyDict_MergeEx(PyObject *mp, PyObject *other, int override);
-PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, struct _Py_Identifier *key, PyObject *item);
+PyAPI_FUNC(int) _PyDict_SetItemId(PyObject *dp, _Py_Identifier *key, PyObject *item);
 
-PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, struct _Py_Identifier *key);
+PyAPI_FUNC(int) _PyDict_DelItemId(PyObject *mp, _Py_Identifier *key);
 PyAPI_FUNC(void) _PyDict_DebugMallocStats(FILE *out);
 
 int _PyObjectDict_SetItem(PyTypeObject *tp, PyObject **dictptr, PyObject *name, PyObject *value);
diff --git a/Include/cpython/frameobject.h b/Include/cpython/frameobject.h
index 67f98a7642b..3d862d9deb0 100644
--- a/Include/cpython/frameobject.h
+++ b/Include/cpython/frameobject.h
@@ -6,7 +6,7 @@
 
 struct _frame {
     PyObject_HEAD
-    struct _frame *f_back;      /* previous frame, or NULL */
+    PyFrameObject *f_back;      /* previous frame, or NULL */
     struct _interpreter_frame *f_frame; /* points to the frame data */
     PyObject *f_trace;          /* Trace function */
     int f_lineno;               /* Current line number. Only valid if non-zero */
diff --git a/Include/cpython/import.h b/Include/cpython/import.h
index da9fb770a92..c734802ff25 100644
--- a/Include/cpython/import.h
+++ b/Include/cpython/import.h
@@ -6,7 +6,7 @@ PyMODINIT_FUNC PyInit__imp(void);
 
 PyAPI_FUNC(int) _PyImport_IsInitialized(PyInterpreterState *);
 
-PyAPI_FUNC(PyObject *) _PyImport_GetModuleId(struct _Py_Identifier *name);
+PyAPI_FUNC(PyObject *) _PyImport_GetModuleId(_Py_Identifier *name);
 PyAPI_FUNC(int) _PyImport_SetModule(PyObject *name, PyObject *module);
 PyAPI_FUNC(int) _PyImport_SetModuleString(const char *name, PyObject* module);
 
diff --git a/Include/cpython/object.h b/Include/cpython/object.h
index 65d7d85b707..5f978eec465 100644
--- a/Include/cpython/object.h
+++ b/Include/cpython/object.h
@@ -201,11 +201,11 @@ struct _typeobject {
     iternextfunc tp_iternext;
 
     /* Attribute descriptor and subclassing stuff */
-    struct PyMethodDef *tp_methods;
-    struct PyMemberDef *tp_members;
-    struct PyGetSetDef *tp_getset;
+    PyMethodDef *tp_methods;
+    PyMemberDef *tp_members;
+    PyGetSetDef *tp_getset;
     // Strong reference on a heap type, borrowed reference on a static type
-    struct _typeobject *tp_base;
+    PyTypeObject *tp_base;
     PyObject *tp_dict;
     descrgetfunc tp_descr_get;
     descrsetfunc tp_descr_set;
@@ -262,7 +262,7 @@ PyAPI_FUNC(PyObject *) _PyObject_LookupSpecialId(PyObject *, _Py_Identifier *);
 PyAPI_FUNC(PyTypeObject *) _PyType_CalculateMetaclass(PyTypeObject *, PyObject *);
 PyAPI_FUNC(PyObject *) _PyType_GetDocFromInternalDoc(const char *, const char *);
 PyAPI_FUNC(PyObject *) _PyType_GetTextSignatureFromInternalDoc(const char *, const char *);
-PyAPI_FUNC(PyObject *) PyType_GetModuleByDef(PyTypeObject *, struct PyModuleDef *);
+PyAPI_FUNC(PyObject *) PyType_GetModuleByDef(PyTypeObject *, PyModuleDef *);
 
 PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
 PyAPI_FUNC(void) _Py_BreakPoint(void);
@@ -270,8 +270,8 @@ PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
 PyAPI_FUNC(int) _PyObject_IsFreed(PyObject *);
 
 PyAPI_FUNC(int) _PyObject_IsAbstract(PyObject *);
-PyAPI_FUNC(PyObject *) _PyObject_GetAttrId(PyObject *, struct _Py_Identifier *);
-PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, struct _Py_Identifier *, PyObject *);
+PyAPI_FUNC(PyObject *) _PyObject_GetAttrId(PyObject *, _Py_Identifier *);
+PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, _Py_Identifier *, PyObject *);
 /* Replacements of PyObject_GetAttr() and _PyObject_GetAttrId() which
    don't raise AttributeError.
 
@@ -282,7 +282,7 @@ PyAPI_FUNC(int) _PyObject_SetAttrId(PyObject *, struct _Py_Identifier *, PyObjec
    is raised.
 */
 PyAPI_FUNC(int) _PyObject_LookupAttr(PyObject *, PyObject *, PyObject **);
-PyAPI_FUNC(int) _PyObject_LookupAttrId(PyObject *, struct _Py_Identifier *, PyObject **);
+PyAPI_FUNC(int) _PyObject_LookupAttrId(PyObject *, _Py_Identifier *, PyObject **);
 
 PyAPI_FUNC(int) _PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method);
 
@@ -461,8 +461,8 @@ passed as second argument to Py_TRASHCAN_BEGIN().
 */
 
 /* Python 3.9 private API, invoked by the macros below. */
-PyAPI_FUNC(int) _PyTrash_begin(struct _ts *tstate, PyObject *op);
-PyAPI_FUNC(void) _PyTrash_end(struct _ts *tstate);
+PyAPI_FUNC(int) _PyTrash_begin(PyThreadState *tstate, PyObject *op);
+PyAPI_FUNC(void) _PyTrash_end(PyThreadState *tstate);
 /* Python 3.10 private API, invoked by the Py_TRASHCAN_BEGIN(). */
 PyAPI_FUNC(int) _PyTrash_cond(PyObject *op, destructor dealloc);
 
diff --git a/Include/cpython/pystate.h b/Include/cpython/pystate.h
index 74dd44d6edc..8150d501d41 100644
--- a/Include/cpython/pystate.h
+++ b/Include/cpython/pystate.h
@@ -79,12 +79,11 @@ typedef struct _stack_chunk {
     PyObject * data[1]; /* Variable sized */
 } _PyStackChunk;
 
-// The PyThreadState typedef is in Include/pystate.h.
 struct _ts {
     /* See Python/ceval.c for comments explaining most fields */
 
-    struct _ts *prev;
-    struct _ts *next;
+    PyThreadState *prev;
+    PyThreadState *next;
     PyInterpreterState *interp;
 
     /* Has been initialized to a safe state.
@@ -308,12 +307,12 @@ PyAPI_FUNC(const PyConfig*) _Py_GetConfig(void);
 
 /* cross-interpreter data */
 
-struct _xid;
-
 // _PyCrossInterpreterData is similar to Py_buffer as an effectively
 // opaque struct that holds data outside the object machinery.  This
 // is necessary to pass safely between interpreters in the same process.
-typedef struct _xid {
+typedef struct _xid _PyCrossInterpreterData;
+
+struct _xid {
     // data is the cross-interpreter-safe derivation of a Python object
     // (see _PyObject_GetCrossInterpreterData).  It will be NULL if the
     // new_object func (below) encodes the data.
@@ -339,7 +338,7 @@ typedef struct _xid {
     // interpreter given the data.  The resulting object (a new
     // reference) will be equivalent to the original object.  This field
     // is required.
-    PyObject *(*new_object)(struct _xid *);
+    PyObject *(*new_object)(_PyCrossInterpreterData *);
     // free is called when the data is released.  If it is NULL then
     // nothing will be done to free the data.  For some types this is
     // okay (e.g. bytes) and for those types this field should be set
@@ -350,7 +349,7 @@ typedef struct _xid {
     // to PyMem_RawFree (the default if not explicitly set to NULL).
     // The call will happen with the original interpreter activated.
     void (*free)(void *);
-} _PyCrossInterpreterData;
+};
 
 PyAPI_FUNC(int) _PyObject_GetCrossInterpreterData(PyObject *, _PyCrossInterpreterData *);
 PyAPI_FUNC(PyObject *) _PyCrossInterpreterData_NewObject(_PyCrossInterpreterData *);
@@ -360,7 +359,7 @@ PyAPI_FUNC(int) _PyObject_CheckCrossInterpreterData(PyObject *);
 
 /* cross-interpreter data registry */
 
-typedef int (*crossinterpdatafunc)(PyObject *, struct _xid *);
+typedef int (*crossinterpdatafunc)(PyObject *, _PyCrossInterpreterData *);
 
 PyAPI_FUNC(int) _PyCrossInterpreterData_RegisterClass(PyTypeObject *, crossinterpdatafunc);
 PyAPI_FUNC(crossinterpdatafunc) _PyCrossInterpreterData_Lookup(PyObject *);
diff --git a/Include/cpython/traceback.h b/Include/cpython/traceback.h
index d0dde335cfe..a4e087b2b4e 100644
--- a/Include/cpython/traceback.h
+++ b/Include/cpython/traceback.h
@@ -2,13 +2,15 @@
 #  error "this header file must not be included directly"
 #endif
 
-typedef struct _traceback {
+typedef struct _traceback PyTracebackObject;
+
+struct _traceback {
     PyObject_HEAD
-    struct _traceback *tb_next;
+    PyTracebackObject *tb_next;
     PyFrameObject *tb_frame;
     int tb_lasti;
     int tb_lineno;
-} PyTracebackObject;
+};
 
 PyAPI_FUNC(int) _Py_DisplaySourceLine(PyObject *, PyObject *, int, int, int *, PyObject **);
 PyAPI_FUNC(void) _PyTraceback_Add(const char *, const char *, int);
diff --git a/Include/descrobject.h b/Include/descrobject.h
index aefa7600346..77f221df077 100644
--- a/Include/descrobject.h
+++ b/Include/descrobject.h
@@ -23,15 +23,11 @@ PyAPI_DATA(PyTypeObject) PyMethodDescr_Type;
 PyAPI_DATA(PyTypeObject) PyWrapperDescr_Type;
 PyAPI_DATA(PyTypeObject) PyDictProxy_Type;
 PyAPI_DATA(PyTypeObject) PyProperty_Type;
-// Forward declaration for following prototype
-struct PyMemberDef;
 
 PyAPI_FUNC(PyObject *) PyDescr_NewMethod(PyTypeObject *, PyMethodDef *);
 PyAPI_FUNC(PyObject *) PyDescr_NewClassMethod(PyTypeObject *, PyMethodDef *);
-PyAPI_FUNC(PyObject *) PyDescr_NewMember(PyTypeObject *,
-                                               struct PyMemberDef *);
-PyAPI_FUNC(PyObject *) PyDescr_NewGetSet(PyTypeObject *,
-                                               struct PyGetSetDef *);
+PyAPI_FUNC(PyObject *) PyDescr_NewMember(PyTypeObject *, PyMemberDef *);
+PyAPI_FUNC(PyObject *) PyDescr_NewGetSet(PyTypeObject *, PyGetSetDef *);
 
 PyAPI_FUNC(PyObject *) PyDictProxy_New(PyObject *);
 PyAPI_FUNC(PyObject *) PyWrapper_New(PyObject *, PyObject *);
diff --git a/Include/modsupport.h b/Include/modsupport.h
index baf47f0038d..6cc2ad01ebe 100644
--- a/Include/modsupport.h
+++ b/Include/modsupport.h
@@ -232,11 +232,9 @@ PyAPI_FUNC(int) PyModule_ExecDef(PyObject *module, PyModuleDef *def);
  #define PyModule_FromDefAndSpec2 PyModule_FromDefAndSpec2TraceRefs
 #endif
 
-PyAPI_FUNC(PyObject *) PyModule_Create2(struct PyModuleDef*,
-                                     int apiver);
+PyAPI_FUNC(PyObject *) PyModule_Create2(PyModuleDef*, int apiver);
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyModule_CreateInitialized(struct PyModuleDef*,
-                                                   int apiver);
+PyAPI_FUNC(PyObject *) _PyModule_CreateInitialized(PyModuleDef*, int apiver);
 #endif
 
 #ifdef Py_LIMITED_API
diff --git a/Include/moduleobject.h b/Include/moduleobject.h
index 0f406832b58..2d41f76df4b 100644
--- a/Include/moduleobject.h
+++ b/Include/moduleobject.h
@@ -32,12 +32,12 @@ PyAPI_FUNC(void) _PyModule_Clear(PyObject *);
 PyAPI_FUNC(void) _PyModule_ClearDict(PyObject *);
 PyAPI_FUNC(int) _PyModuleSpec_IsInitializing(PyObject *);
 #endif
-PyAPI_FUNC(struct PyModuleDef*) PyModule_GetDef(PyObject*);
+PyAPI_FUNC(PyModuleDef*) PyModule_GetDef(PyObject*);
 PyAPI_FUNC(void*) PyModule_GetState(PyObject*);
 
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
 /* New in 3.5 */
-PyAPI_FUNC(PyObject *) PyModuleDef_Init(struct PyModuleDef*);
+PyAPI_FUNC(PyObject *) PyModuleDef_Init(PyModuleDef*);
 PyAPI_DATA(PyTypeObject) PyModuleDef_Type;
 #endif
 
@@ -56,6 +56,7 @@ typedef struct PyModuleDef_Base {
   }
 
 struct PyModuleDef_Slot;
+
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
 /* New in 3.5 */
 typedef struct PyModuleDef_Slot{
@@ -78,7 +79,7 @@ struct PyModuleDef {
   const char* m_doc;
   Py_ssize_t m_size;
   PyMethodDef *m_methods;
-  struct PyModuleDef_Slot* m_slots;
+  PyModuleDef_Slot *m_slots;
   traverseproc m_traverse;
   inquiry m_clear;
   freefunc m_free;
diff --git a/Include/object.h b/Include/object.h
index 5313ea6f867..317515d2c81 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -63,8 +63,8 @@ whose size is determined when the object is allocated.
 #ifdef Py_TRACE_REFS
 /* Define pointers to support a doubly-linked list of all live heap objects. */
 #define _PyObject_HEAD_EXTRA            \
-    struct _object *_ob_next;           \
-    struct _object *_ob_prev;
+    PyObject *_ob_next;           \
+    PyObject *_ob_prev;
 
 #define _PyObject_EXTRA_INIT 0, 0,
 
@@ -237,8 +237,8 @@ PyAPI_FUNC(void*) PyType_GetSlot(PyTypeObject*, int);
 #endif
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03090000
 PyAPI_FUNC(PyObject*) PyType_FromModuleAndSpec(PyObject *, PyType_Spec *, PyObject *);
-PyAPI_FUNC(PyObject *) PyType_GetModule(struct _typeobject *);
-PyAPI_FUNC(void *) PyType_GetModuleState(struct _typeobject *);
+PyAPI_FUNC(PyObject *) PyType_GetModule(PyTypeObject *);
+PyAPI_FUNC(void *) PyType_GetModuleState(PyTypeObject *);
 #endif
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030B0000
 PyAPI_FUNC(PyObject *) PyType_GetName(PyTypeObject *);
diff --git a/Include/pystate.h b/Include/pystate.h
index 5b4245ed7f3..e6b4de979c8 100644
--- a/Include/pystate.h
+++ b/Include/pystate.h
@@ -40,10 +40,10 @@ PyAPI_FUNC(int64_t) PyInterpreterState_GetID(PyInterpreterState *);
 /* State unique per thread */
 
 /* New in 3.3 */
-PyAPI_FUNC(int) PyState_AddModule(PyObject*, struct PyModuleDef*);
-PyAPI_FUNC(int) PyState_RemoveModule(struct PyModuleDef*);
+PyAPI_FUNC(int) PyState_AddModule(PyObject*, PyModuleDef*);
+PyAPI_FUNC(int) PyState_RemoveModule(PyModuleDef*);
 #endif
-PyAPI_FUNC(PyObject*) PyState_FindModule(struct PyModuleDef*);
+PyAPI_FUNC(PyObject*) PyState_FindModule(PyModuleDef*);
 
 PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
 PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
diff --git a/Include/structmember.h b/Include/structmember.h
index acce4381d4e..65a777d5f52 100644
--- a/Include/structmember.h
+++ b/Include/structmember.h
@@ -65,8 +65,8 @@ struct PyMemberDef {
 #define PY_AUDIT_READ       READ_RESTRICTED
 
 /* Current API, use this */
-PyAPI_FUNC(PyObject *) PyMember_GetOne(const char *, struct PyMemberDef *);
-PyAPI_FUNC(int) PyMember_SetOne(char *, struct PyMemberDef *, PyObject *);
+PyAPI_FUNC(PyObject *) PyMember_GetOne(const char *, PyMemberDef *);
+PyAPI_FUNC(int) PyMember_SetOne(char *, PyMemberDef *, PyObject *);
 
 
 #ifdef __cplusplus
diff --git a/Include/structseq.h b/Include/structseq.h
index e89265a67c3..4f5c09f7ba0 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -15,7 +15,7 @@ typedef struct PyStructSequence_Field {
 typedef struct PyStructSequence_Desc {
     const char *name;
     const char *doc;
-    struct PyStructSequence_Field *fields;
+    PyStructSequence_Field *fields;
     int n_in_sequence;
 } PyStructSequence_Desc;
 
diff --git a/Objects/call.c b/Objects/call.c
index c3939ea0d07..9646ad2d775 100644
--- a/Objects/call.c
+++ b/Objects/call.c
@@ -884,8 +884,7 @@ PyObject_CallMethodObjArgs(PyObject *obj, PyObject *name, ...)
 
 
 PyObject *
-_PyObject_CallMethodIdObjArgs(PyObject *obj,
-                              struct _Py_Identifier *name, ...)
+_PyObject_CallMethodIdObjArgs(PyObject *obj, _Py_Identifier *name, ...)
 {
     PyThreadState *tstate = _PyThreadState_GET();
     if (obj == NULL || name == NULL) {
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index fca879f4e3c..68b79f25156 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -1500,7 +1500,7 @@ _PyDict_GetItemWithError(PyObject *dp, PyObject *kv)
 }
 
 PyObject *
-_PyDict_GetItemIdWithError(PyObject *dp, struct _Py_Identifier *key)
+_PyDict_GetItemIdWithError(PyObject *dp, _Py_Identifier *key)
 {
     PyObject *kv;
     kv = _PyUnicode_FromId(key); /* borrowed */
@@ -3411,7 +3411,7 @@ _PyDict_Contains_KnownHash(PyObject *op, PyObject *key, Py_hash_t hash)
 }
 
 int
-_PyDict_ContainsId(PyObject *op, struct _Py_Identifier *key)
+_PyDict_ContainsId(PyObject *op, _Py_Identifier *key)
 {
     PyObject *kv = _PyUnicode_FromId(key); /* borrowed */
     if (kv == NULL) {
@@ -3589,7 +3589,7 @@ PyDict_GetItemString(PyObject *v, const char *key)
 }
 
 int
-_PyDict_SetItemId(PyObject *v, struct _Py_Identifier *key, PyObject *item)
+_PyDict_SetItemId(PyObject *v, _Py_Identifier *key, PyObject *item)
 {
     PyObject *kv;
     kv = _PyUnicode_FromId(key); /* borrowed */
diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index bd5e5611ec2..72ed9bb82f9 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -19,7 +19,7 @@ static PyMemberDef module_members[] = {
 PyTypeObject PyModuleDef_Type = {
     PyVarObject_HEAD_INIT(&PyType_Type, 0)
     "moduledef",                                /* tp_name */
-    sizeof(struct PyModuleDef),                 /* tp_basicsize */
+    sizeof(PyModuleDef),                        /* tp_basicsize */
     0,                                          /* tp_itemsize */
 };
 
@@ -32,13 +32,13 @@ _PyModule_IsExtension(PyObject *obj)
     }
     PyModuleObject *module = (PyModuleObject*)obj;
 
-    struct PyModuleDef *def = module->md_def;
+    PyModuleDef *def = module->md_def;
     return (def != NULL && def->m_methods != NULL);
 }
 
 
 PyObject*
-PyModuleDef_Init(struct PyModuleDef* def)
+PyModuleDef_Init(PyModuleDef* def)
 {
     assert(PyModuleDef_Type.tp_flags & Py_TPFLAGS_READY);
     if (def->m_base.m_index == 0) {
@@ -182,7 +182,7 @@ _add_methods_to_object(PyObject *module, PyObject *name, PyMethodDef *functions)
 }
 
 PyObject *
-PyModule_Create2(struct PyModuleDef* module, int module_api_version)
+PyModule_Create2(PyModuleDef* module, int module_api_version)
 {
     if (!_PyImport_IsInitialized(_PyInterpreterState_GET())) {
         PyErr_SetString(PyExc_SystemError,
@@ -193,7 +193,7 @@ PyModule_Create2(struct PyModuleDef* module, int module_api_version)
 }
 
 PyObject *
-_PyModule_CreateInitialized(struct PyModuleDef* module, int module_api_version)
+_PyModule_CreateInitialized(PyModuleDef* module, int module_api_version)
 {
     const char* name;
     PyModuleObject *m;
@@ -256,7 +256,7 @@ _PyModule_CreateInitialized(struct PyModuleDef* module, int module_api_version)
 }
 
 PyObject *
-PyModule_FromDefAndSpec2(struct PyModuleDef* def, PyObject *spec, int module_api_version)
+PyModule_FromDefAndSpec2(PyModuleDef* def, PyObject *spec, int module_api_version)
 {
     PyModuleDef_Slot* cur_slot;
     PyObject *(*create)(PyObject *, PyModuleDef*) = NULL;
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 4b7035c81e5..286261226fa 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -3716,7 +3716,7 @@ PyType_GetModuleState(PyTypeObject *type)
  * given PyModuleDef.
  */
 PyObject *
-PyType_GetModuleByDef(PyTypeObject *type, struct PyModuleDef *def)
+PyType_GetModuleByDef(PyTypeObject *type, PyModuleDef *def)
 {
     assert(PyType_Check(type));
 
@@ -3869,7 +3869,7 @@ _PyType_Lookup(PyTypeObject *type, PyObject *name)
 }
 
 PyObject *
-_PyType_LookupId(PyTypeObject *type, struct _Py_Identifier *name)
+_PyType_LookupId(PyTypeObject *type, _Py_Identifier *name)
 {
     PyObject *oname;
     oname = _PyUnicode_FromId(name);   /* borrowed */
diff --git a/Python/import.c b/Python/import.c
index 74f8e1dd4c3..982ec8cfe63 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -283,7 +283,7 @@ _PyImport_IsInitialized(PyInterpreterState *interp)
 }
 
 PyObject *
-_PyImport_GetModuleId(struct _Py_Identifier *nameid)
+_PyImport_GetModuleId(_Py_Identifier *nameid)
 {
     PyObject *name = _PyUnicode_FromId(nameid); /* borrowed */
     if (name == NULL) {
diff --git a/Python/pystate.c b/Python/pystate.c
index a85460c1510..85000016cb4 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -862,7 +862,7 @@ _PyThreadState_SetCurrent(PyThreadState *tstate)
 }
 
 PyObject*
-PyState_FindModule(struct PyModuleDef* module)
+PyState_FindModule(PyModuleDef* module)
 {
     Py_ssize_t index = module->m_base.m_index;
     PyInterpreterState *state = _PyInterpreterState_GET();
@@ -881,7 +881,7 @@ PyState_FindModule(struct PyModuleDef* module)
 }
 
 int
-_PyState_AddModule(PyThreadState *tstate, PyObject* module, struct PyModuleDef* def)
+_PyState_AddModule(PyThreadState *tstate, PyObject* module, PyModuleDef* def)
 {
     if (!def) {
         assert(_PyErr_Occurred(tstate));
@@ -914,7 +914,7 @@ _PyState_AddModule(PyThreadState *tstate, PyObject* module, struct PyModuleDef*
 }
 
 int
-PyState_AddModule(PyObject* module, struct PyModuleDef* def)
+PyState_AddModule(PyObject* module, PyModuleDef* def)
 {
     if (!def) {
         Py_FatalError("module definition is NULL");
@@ -935,7 +935,7 @@ PyState_AddModule(PyObject* module, struct PyModuleDef* def)
 }
 
 int
-PyState_RemoveModule(struct PyModuleDef* def)
+PyState_RemoveModule(PyModuleDef* def)
 {
     PyThreadState *tstate = _PyThreadState_GET();
     PyInterpreterState *interp = tstate->interp;
diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index 4b4ebb8313a..14252b2514e 100755
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -3665,8 +3665,7 @@ class self_converter(CConverter):
             self.show_in_signature = False
 
     # tp_new (METHOD_NEW) functions are of type newfunc:
-    #     typedef PyObject *(*newfunc)(struct _typeobject *, PyObject *, PyObject *);
-    # PyTypeObject is a typedef for struct _typeobject.
+    #     typedef PyObject *(*newfunc)(PyTypeObject *, PyObject *, PyObject *);
     #
     # tp_init (METHOD_INIT) functions are of type initproc:
     #     typedef int (*initproc)(PyObject *, PyObject *, PyObject *);