diff --git a/Include/internal/pycore_typeobject.h b/Include/internal/pycore_typeobject.h
index 8af317d54c0bda..9c8b00550e3980 100644
--- a/Include/internal/pycore_typeobject.h
+++ b/Include/internal/pycore_typeobject.h
@@ -96,7 +96,6 @@ PyAPI_FUNC(PyObject *) _PyType_LookupSubclasses(PyTypeObject *);
 PyAPI_FUNC(PyObject *) _PyType_InitSubclasses(PyTypeObject *);
 
 extern PyObject * _PyType_GetBases(PyTypeObject *type);
-extern PyObject * _PyType_GetMRO(PyTypeObject *type);
 extern PyObject* _PyType_GetSubclasses(PyTypeObject *);
 extern int _PyType_HasSubclasses(PyTypeObject *);
 
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index d77d981085f4da..c5e94a8668fef2 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -651,28 +651,6 @@ lookup_tp_mro(PyTypeObject *self)
     return self->tp_mro;
 }
 
-PyObject *
-_PyType_GetMRO(PyTypeObject *self)
-{
-#ifdef Py_GIL_DISABLED
-    PyObject *mro = _Py_atomic_load_ptr_relaxed(&self->tp_mro);
-    if (mro == NULL) {
-        return NULL;
-    }
-    if (_Py_TryIncrefCompare(&self->tp_mro, mro)) {
-        return mro;
-    }
-
-    BEGIN_TYPE_LOCK();
-    mro = lookup_tp_mro(self);
-    Py_XINCREF(mro);
-    END_TYPE_LOCK();
-    return mro;
-#else
-    return Py_XNewRef(lookup_tp_mro(self));
-#endif
-}
-
 static inline void
 set_tp_mro(PyTypeObject *self, PyObject *mro, int initial)
 {