diff --git a/include/wx/bmpbuttn.h b/include/wx/bmpbuttn.h
index 1bc0a1239b..442369808c 100644
--- a/include/wx/bmpbuttn.h
+++ b/include/wx/bmpbuttn.h
@@ -67,7 +67,7 @@ public:
 
 protected:
     // function called when any of the bitmaps changes
-    virtual void OnSetBitmap() { InvalidateBestSize(); }
+    virtual void OnSetBitmap() { InvalidateBestSize(); Refresh(); }
 
     // the bitmaps for various states
     wxBitmap m_bmpNormal,