diff --git a/js/ui/layout.js b/js/ui/layout.js
index 6791ebae5..4bc41c6ae 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -114,7 +114,6 @@ const LayoutManager = new Lang.Class({
         this._background = null;
         this._leftPanelBarrier = 0;
         this._rightPanelBarrier = 0;
-        this._trayBarrier = 0;
 
         this._inOverview = false;
         this._updateRegionIdle = 0;