diff --git a/samples/propgrid/propgrid.cpp b/samples/propgrid/propgrid.cpp
index 591a7977c6..6f35b6147a 100644
--- a/samples/propgrid/propgrid.cpp
+++ b/samples/propgrid/propgrid.cpp
@@ -2658,6 +2658,7 @@ void FormMain::OnTestReplaceClick( wxCommandEvent& WXUNUSED(event) )
 void FormMain::OnClearModifyStatusClick( wxCommandEvent& WXUNUSED(event) )
 {
     m_pPropGridManager->ClearModifiedStatus();
+    m_pPropGridManager->Refresh();
 }
 
 // -----------------------------------------------------------------------