diff --git a/include/wx/msw/radiobut.h b/include/wx/msw/radiobut.h
index 0554881601..fc6d2a8949 100644
--- a/include/wx/msw/radiobut.h
+++ b/include/wx/msw/radiobut.h
@@ -13,7 +13,7 @@
 
 #include "wx/msw/ownerdrawnbutton.h"
 
-class WXDLLIMPEXP_CORE wxRadioButton : public public wxRadioButtonBase<wxMSWOwnerDrawnButton<wxControl>>
+class WXDLLIMPEXP_CORE wxRadioButton : public wxRadioButtonBase< wxMSWOwnerDrawnButton<wxControl> >
 {
 public:
     // ctors and creation functions