diff --git a/interface/wx/propgrid/property.h b/interface/wx/propgrid/property.h
index 64f6902261..bec7d6771a 100644
--- a/interface/wx/propgrid/property.h
+++ b/interface/wx/propgrid/property.h
@@ -2055,6 +2055,9 @@ public:
 protected:
     /** Deletes all child properties. */
     void Empty();
+
+    void SetFlag( wxPGPropertyFlags flag );
+    void ClearFlag( FlagType flag );
 };