diff --git a/Include/moduleobject.h b/Include/moduleobject.h
index 42eac82..376a525 100644
--- a/Include/moduleobject.h
+++ b/Include/moduleobject.h
@@ -16,6 +16,7 @@
 PyAPI_FUNC(PyObject *) PyModule_GetDict(PyObject *);
 PyAPI_FUNC(const char *) PyModule_GetName(PyObject *);
 PyAPI_FUNC(const char *) PyModule_GetFilename(PyObject *);
+PyAPI_FUNC(PyObject *) PyModule_GetFilenameObject(PyObject *);
 PyAPI_FUNC(void) _PyModule_Clear(PyObject *);
 PyAPI_FUNC(struct PyModuleDef*) PyModule_GetDef(PyObject*);
 PyAPI_FUNC(void*) PyModule_GetState(PyObject*);