diff --git a/Include/structmember.h b/Include/structmember.h
index 96d2331b044..91b23d5b5bb 100644
--- a/Include/structmember.h
+++ b/Include/structmember.h
@@ -79,11 +79,11 @@ typedef struct PyMemberDef {
 
 
 /* Obsolete API, for binary backwards compatibility */
-PyAPI_FUNC(PyObject *) PyMember_Get(char *, struct memberlist *, char *);
-PyAPI_FUNC(int) PyMember_Set(char *, struct memberlist *, char *, PyObject *);
+PyAPI_FUNC(PyObject *) PyMember_Get(const char *, struct memberlist *, const char *);
+PyAPI_FUNC(int) PyMember_Set(char *, struct memberlist *, const char *, PyObject *);
 
 /* Current API, use this */
-PyAPI_FUNC(PyObject *) PyMember_GetOne(char *, struct PyMemberDef *);
+PyAPI_FUNC(PyObject *) PyMember_GetOne(const char *, struct PyMemberDef *);
 PyAPI_FUNC(int) PyMember_SetOne(char *, struct PyMemberDef *, PyObject *);
 
 
diff --git a/PC/_winreg.c b/PC/_winreg.c
index a20b09a4ee0..34e4f6895a8 100644
--- a/PC/_winreg.c
+++ b/PC/_winreg.c
@@ -455,7 +455,7 @@ static PyNumberMethods PyHKEY_NumberMethods =
 
 
 /* fwd declare __getattr__ */
-static PyObject *PyHKEY_getattr(PyObject *self, char *name);
+static PyObject *PyHKEY_getattr(PyObject *self, const char *name);
 
 /* The type itself */
 PyTypeObject PyHKEY_Type =
@@ -526,7 +526,7 @@ static struct PyMethodDef PyHKEY_methods[] = {
 };
 
 /*static*/ PyObject *
-PyHKEY_getattr(PyObject *self, char *name)
+PyHKEY_getattr(PyObject *self, const char *name)
 {
 	PyObject *res;
 
diff --git a/Python/structmember.c b/Python/structmember.c
index 1574c95cf8a..0a24d9d26cd 100644
--- a/Python/structmember.c
+++ b/Python/structmember.c
@@ -29,7 +29,7 @@ listmembers(struct memberlist *mlist)
 }
 
 PyObject *
-PyMember_Get(char *addr, struct memberlist *mlist, char *name)
+PyMember_Get(const char *addr, struct memberlist *mlist, const char *name)
 {
 	struct memberlist *l;
 
@@ -51,7 +51,7 @@ PyMember_Get(char *addr, struct memberlist *mlist, char *name)
 }
 
 PyObject *
-PyMember_GetOne(char *addr, PyMemberDef *l)
+PyMember_GetOne(const char *addr, PyMemberDef *l)
 {
 	PyObject *v;
 	if ((l->flags & READ_RESTRICTED) &&
@@ -134,7 +134,7 @@ PyMember_GetOne(char *addr, PyMemberDef *l)
 }
 
 int
-PyMember_Set(char *addr, struct memberlist *mlist, char *name, PyObject *v)
+PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
 {
 	struct memberlist *l;