diff --git a/samples/treectrl/treetest.h b/samples/treectrl/treetest.h
index 157c822767..c692ba3506 100644
--- a/samples/treectrl/treetest.h
+++ b/samples/treectrl/treetest.h
@@ -238,9 +238,9 @@ private:
 // menu and control ids
 enum
 {
-    TreeTest_Quit,
-    TreeTest_About,
-    TreeTest_TogButtons,
+    TreeTest_Quit = wxID_EXIT,
+    TreeTest_About = wxID_ABOUT,
+    TreeTest_TogButtons = wxID_HIGHEST,
     TreeTest_TogTwist,
     TreeTest_TogLines,
     TreeTest_TogEdit,