diff --git a/gtk2_ardour/route_group_dialog.cc b/gtk2_ardour/route_group_dialog.cc
index 83b9c0211e..d0ad33eae8 100644
--- a/gtk2_ardour/route_group_dialog.cc
+++ b/gtk2_ardour/route_group_dialog.cc
@@ -42,7 +42,7 @@ using namespace std;
 using namespace PBD;
 
 RouteGroupDialog::RouteGroupDialog (RouteGroup* g, bool creating_new)
-	: ArdourDialog (_("Track/bus Group"))
+	: ArdourDialog (_("Track/bus Group"), creating_new)
 	, _group (g)
 	, _initial_name (g->name ())
 	, _active (_("Active"))