diff --git a/gtk2_ardour/editor_ops.cc b/gtk2_ardour/editor_ops.cc
index 07fa68f714..47ffd952d2 100644
--- a/gtk2_ardour/editor_ops.cc
+++ b/gtk2_ardour/editor_ops.cc
@@ -3626,6 +3626,7 @@ void*
 Editor::freeze_thread ()
 {
 	clicked_routeview->audio_track()->freeze (*current_interthread_info);
+	current_interthread_info->done = true;
 	return 0;
 }