diff --git a/samples/listctrl/listtest.cpp b/samples/listctrl/listtest.cpp
index f10280b690..e69a82ceb3 100644
--- a/samples/listctrl/listtest.cpp
+++ b/samples/listctrl/listtest.cpp
@@ -337,7 +337,7 @@ void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 {
     wxMessageDialog dialog(this, wxT("List test sample\nJulian Smart (c) 1997"),
-            wxT("About list test"), wxOK|wxCANCEL);
+            wxT("About list test"));
 
     dialog.ShowModal();
 }