diff --git a/gtk2_ardour/trigger_master.cc b/gtk2_ardour/trigger_master.cc
index 27fdc75345..49032cd97e 100644
--- a/gtk2_ardour/trigger_master.cc
+++ b/gtk2_ardour/trigger_master.cc
@@ -225,6 +225,7 @@ TriggerMaster::TriggerMaster (Item* parent)
 
 TriggerMaster::~TriggerMaster ()
 {
+	update_connection.disconnect ();
 }
 
 void