diff --git a/include/wx/mac/notebook.h b/include/wx/mac/notebook.h
index de06aa8331..516b9d29e9 100644
--- a/include/wx/mac/notebook.h
+++ b/include/wx/mac/notebook.h
@@ -119,7 +119,7 @@ public:
   void OnSelChange(wxNotebookEvent& event);
   void OnSetFocus(wxFocusEvent& event);
   void OnNavigationKey(wxNavigationKeyEvent& event);
-  
+  void OnMouse(wxMouseEvent &event);  
 
     // implementation
     // --------------