diff --git a/gtk2_ardour/ardour_ui_dependents.cc b/gtk2_ardour/ardour_ui_dependents.cc
index 9240ada261..e95bfab8fc 100644
--- a/gtk2_ardour/ardour_ui_dependents.cc
+++ b/gtk2_ardour/ardour_ui_dependents.cc
@@ -122,6 +122,7 @@ ARDOUR_UI::connect_dependents_to_session (ARDOUR::Session *s)
 	mixer->set_session (s);
 	meterbridge->set_session (s);
 	luawindow->set_session (s);
+	masters->set_session (s);
 
 	/* its safe to do this now */