diff --git a/include/wx/osx/popupwin.h b/include/wx/osx/popupwin.h
index cdfa6ef61c..4a429de678 100644
--- a/include/wx/osx/popupwin.h
+++ b/include/wx/osx/popupwin.h
@@ -27,9 +27,8 @@ public:
 
     bool Create(wxWindow *parent, int flags = wxBORDER_NONE);
 
-    virtual bool Show(bool show);
+    virtual bool Show(bool show = true);
 
-protected:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxPopupWindow)
 };