diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index f2453677553..af7ddf938e9 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -55,6 +55,8 @@ void Py_Exit Py_PROTO((int));
 
 void Py_Cleanup Py_PROTO((void));
 
+void Py_FatalError Py_PROTO((char *));
+
 #ifdef __cplusplus
 }
 #endif