diff --git a/samples/propgrid/propgrid.cpp b/samples/propgrid/propgrid.cpp
index 8cc2d539da..b41ca175ee 100644
--- a/samples/propgrid/propgrid.cpp
+++ b/samples/propgrid/propgrid.cpp
@@ -3047,6 +3047,7 @@ void FormMain::OnMisc ( wxCommandEvent& event )
         if ( prop )
         {
             m_pPropGridManager->SetPropertyValueUnspecified(prop);
+            prop->RefreshEditor();
         }
     }
 }