diff --git a/gtk2_ardour/transport_control_ui.cc b/gtk2_ardour/transport_control_ui.cc
index ee23ef41b4..9a4fa95e8b 100644
--- a/gtk2_ardour/transport_control_ui.cc
+++ b/gtk2_ardour/transport_control_ui.cc
@@ -169,6 +169,7 @@ TransportControlUI::set_session (ARDOUR::Session *s)
 {
 	SessionHandlePtr::set_session (s);
 	set_loop_sensitivity ();
+	map_transport_state ();
 
 	if (!_session) {
 		rec_button.set_sensitive (false);