diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index 74ab986..48e39a4 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -188,7 +188,7 @@
 PyAPI_FUNC(PyObject *) _PyBuiltin_Init(void);
 PyAPI_FUNC(PyObject *) _PySys_Init(void);
 PyAPI_FUNC(void) _PyImport_Init(void);
-PyAPI_FUNC(void) _PyExc_Init(void);
+PyAPI_FUNC(void) _PyExc_Init(PyObject * bltinmod);
 PyAPI_FUNC(void) _PyImportHooks_Init(void);
 PyAPI_FUNC(int) _PyFrame_Init(void);
 PyAPI_FUNC(void) _PyFloat_Init(void);