diff --git a/include/wx/defs.h b/include/wx/defs.h
index 8eadc9138e..6c21fe8f27 100644
--- a/include/wx/defs.h
+++ b/include/wx/defs.h
@@ -1825,6 +1825,7 @@ typedef void*       WXPOINTPTR ;
 typedef void*       WXHWND ;
 typedef void*       WXEVENTREF ;
 typedef void*		WXEVENTHANDLERREF ;
+typedef void*       WXEVENTHANDLERCALLREF ; 
 typedef void*       WXAPPLEEVENTREF ;
 typedef void*       WXHDC ;
 typedef void*       WXHMENU ;