diff --git a/include/wx/mac/window.h b/include/wx/mac/window.h
index 9c449c2413..f4d36dd7cb 100644
--- a/include/wx/mac/window.h
+++ b/include/wx/mac/window.h
@@ -256,6 +256,7 @@ public :
 
 	static long							MacRemoveBordersFromStyle( long style ) ;
 	virtual void 						MacSuperChangedPosition() ;
+	virtual void                        MacTopLevelWindowChangedPosition() ;
 	virtual void						MacSuperShown( bool show ) ;
 	bool								MacIsReallyShown() const ;
 /*