diff --git a/include/wx/mac/control.h b/include/wx/mac/control.h
index ab14b598b3..4cf51df8f6 100644
--- a/include/wx/mac/control.h
+++ b/include/wx/mac/control.h
@@ -74,6 +74,7 @@ public:
    virtual void 	 MacSuperEnabled( bool enabled ) ;
    virtual void 	 MacSuperShown( bool show ) ;
    virtual bool		 MacCanFocus() const ;
+   virtual void		 MacUpdateDimensions() ;
    
    virtual void  	 DoSetSize(int x, int y,int width, int height,int sizeFlags = wxSIZE_AUTO ) ;
    void 	         OnKeyDown( wxKeyEvent &event ) ;
diff --git a/include/wx/mac/slider.h b/include/wx/mac/slider.h
index 44f8719b05..93839af765 100644
--- a/include/wx/mac/slider.h
+++ b/include/wx/mac/slider.h
@@ -88,6 +88,7 @@ public:
  
   void Command(wxCommandEvent& event);
 	void 					MacHandleControlClick( WXWidget control , wxInt16 controlpart ) ;
+	virtual void            MacUpdateDimensions() ;
 
  	wxStaticText*	m_macMinimumStatic ;
  	wxStaticText*	m_macMaximumStatic ;