diff --git a/gtk2_ardour/route_time_axis.cc b/gtk2_ardour/route_time_axis.cc
index 5cba4d63ba..2772561c92 100644
--- a/gtk2_ardour/route_time_axis.cc
+++ b/gtk2_ardour/route_time_axis.cc
@@ -2550,7 +2550,7 @@ RouteTimeAxisView::combine_regions ()
 	}
 
 	playlist->clear_changes ();
-	boost::shared_ptr<Region> compound_region = playlist->combine (selected_regions);
+	boost::shared_ptr<Region> compound_region = playlist->combine (selected_regions, track());
 
 	_session->add_command (new StatefulDiffCommand (playlist));
 	/* make the new region be selected */