diff --git a/include/wx/dataobj.h b/include/wx/dataobj.h
index c1ac807fc3..12164ccd54 100644
--- a/include/wx/dataobj.h
+++ b/include/wx/dataobj.h
@@ -81,7 +81,6 @@ private:
 
 class WXDLLEXPORT wxPrivateDataObject : public wxDataObject
 {
-    DECLARE_DYNAMIC_CLASS( wxPrivateDataObject )
 
 public:
     wxPrivateDataObject();