diff --git a/include/wx/msw/radiobox.h b/include/wx/msw/radiobox.h
index e6e1c1ae10..2edf86df4f 100644
--- a/include/wx/msw/radiobox.h
+++ b/include/wx/msw/radiobox.h
@@ -163,6 +163,8 @@ protected:
     virtual WXHRGN MSWGetRegionWithoutChildren();
 #endif // __WXWINCE__
 
+    // resolve ambiguity in base classes
+    virtual wxBorder GetDefaultBorder() const { return wxRadioBoxBase::GetDefaultBorder(); }
 
     // the buttons we contain
     wxSubwindows *m_radioButtons;