diff --git a/gtk2_ardour/ardour_ui_dialogs.cc b/gtk2_ardour/ardour_ui_dialogs.cc
index 89a14a5c7e..1ce6a24323 100644
--- a/gtk2_ardour/ardour_ui_dialogs.cc
+++ b/gtk2_ardour/ardour_ui_dialogs.cc
@@ -234,6 +234,7 @@ ARDOUR_UI::set_session (Session *s)
 	start_clocking ();
 
 	map_transport_state ();
+	set_punch_sensitivity ();
 
 	second_connection = Timers::second_connect (sigc::mem_fun(*this, &ARDOUR_UI::every_second));
 	point_one_second_connection = Timers::rapid_connect (sigc::mem_fun(*this, &ARDOUR_UI::every_point_one_seconds));