diff --git a/Include/import.h b/Include/import.h
index 400e97cefe2..26e1f0f28da 100644
--- a/Include/import.h
+++ b/Include/import.h
@@ -65,9 +65,9 @@ PyAPI_FUNC(int) _PyImport_ReleaseLock(void);
 PyAPI_FUNC(void) _PyImport_ReInitLock(void);
 
 PyAPI_FUNC(PyObject *)_PyImport_FindBuiltin(
-    char *name                  /* UTF-8 encoded string */
+    const char *name            /* UTF-8 encoded string */
     );
-PyAPI_FUNC(PyObject *)_PyImport_FindExtensionUnicode(char *, PyObject *);
+PyAPI_FUNC(PyObject *)_PyImport_FindExtensionUnicode(const char *, PyObject *);
 PyAPI_FUNC(int)_PyImport_FixupBuiltin(
     PyObject *mod,
     char *name                  /* UTF-8 encoded string */
diff --git a/Python/import.c b/Python/import.c
index f4015b52faa..39cd93f7ddf 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -636,7 +636,7 @@ _PyImport_FixupBuiltin(PyObject *mod, char *name)
 }
 
 PyObject *
-_PyImport_FindExtensionUnicode(char *name, PyObject *filename)
+_PyImport_FindExtensionUnicode(const char *name, PyObject *filename)
 {
     PyObject *mod, *mdict;
     PyModuleDef* def;
@@ -680,7 +680,7 @@ _PyImport_FindExtensionUnicode(char *name, PyObject *filename)
 }
 
 PyObject *
-_PyImport_FindBuiltin(char *name)
+_PyImport_FindBuiltin(const char *name)
 {
     PyObject *res, *filename;
     filename = PyUnicode_FromString(name);