diff --git a/js/ui/layout.js b/js/ui/layout.js
index 6f7bcebc5..82d848a5a 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -853,7 +853,6 @@ const LayoutManager = new Lang.Class({
         this._trackedActors.splice(i, 1);
         actor.disconnect(actorData.visibleId);
         actor.disconnect(actorData.allocationId);
-        actor.disconnect(actorData.parentSetId);
         actor.disconnect(actorData.destroyId);
 
         this._queueUpdateRegions();