diff --git a/gtk2_ardour/triggerbox_ui.cc b/gtk2_ardour/triggerbox_ui.cc
index 028b82699f..dc95ef0ebf 100644
--- a/gtk2_ardour/triggerbox_ui.cc
+++ b/gtk2_ardour/triggerbox_ui.cc
@@ -138,7 +138,9 @@ TriggerEntry::selection_change ()
 void
 TriggerEntry::maybe_update ()
 {
-	// what here?
+	if (trigger()->active()) {
+		redraw();
+	}
 }
 
 void