diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 0d7009ac57bd5f..ea5f7f8abed4f6 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -5176,7 +5176,7 @@ PyType_GetModuleState(PyTypeObject *type)
 /* Get the module of the first superclass where the module has the
  * given PyModuleDef.
  */
-static inline PyObject *
+static inline Py_ALWAYS_INLINE PyObject *
 get_module_by_def(PyTypeObject *type, PyModuleDef *def)
 {
     assert(PyType_Check(type));