diff --git a/interface/wx/propgrid/editors.h b/interface/wx/propgrid/editors.h
index ca7488394d..7409284b74 100644
--- a/interface/wx/propgrid/editors.h
+++ b/interface/wx/propgrid/editors.h
@@ -129,7 +129,7 @@ public:
 
     /** Sets value in control to unspecified. */
     virtual void SetValueToUnspecified( wxPGProperty* property,
-                                        wxWindow* ctrl ) const = 0;
+                                        wxWindow* ctrl ) const;
 
     /**
         Called by property grid to set new appearance for the control.