diff --git a/gtk2_ardour/editor_rulers.cc b/gtk2_ardour/editor_rulers.cc
index fb7ae76cb9..e9c861a5e5 100644
--- a/gtk2_ardour/editor_rulers.cc
+++ b/gtk2_ardour/editor_rulers.cc
@@ -216,7 +216,7 @@ Editor::popup_ruler_menu (timepos_t const & where, ItemType t)
 
 	// always build from scratch
 	MenuList& ruler_items = editor_ruler_menu->items();
-	CheckMenuItem* cme;
+	Gtk::CheckMenuItem* cme;
 
 	editor_ruler_menu->set_name ("ArdourContextMenu");
 	ruler_items.clear();