diff --git a/include/wx/mac/scrolbar.h b/include/wx/mac/scrolbar.h
index 10e80637db..62f85a3437 100644
--- a/include/wx/mac/scrolbar.h
+++ b/include/wx/mac/scrolbar.h
@@ -50,6 +50,8 @@ public:
   inline int GetPageSize() const { return m_viewSize; }
   inline int GetRange() const { return m_objectSize; }
 
+  bool IsVertical() const { return (m_windowStyle & wxVERTICAL) != 0; }
+
   virtual void SetThumbPosition(int viewStart);
   virtual void SetScrollbar(int position, int thumbSize, int range, int pageSize,
     bool refresh = TRUE);