diff --git a/js/ui/workspacesView.js b/js/ui/workspacesView.js
index 08138f788..955aee0c6 100644
--- a/js/ui/workspacesView.js
+++ b/js/ui/workspacesView.js
@@ -551,7 +551,6 @@ WorkspacesDisplay.prototype = {
                          Lang.bind(this, this._onScrollEvent));
 
         this._monitorIndex = Main.layoutManager.primaryIndex;
-        this._monitor = Main.layoutManager.monitors[this._monitorIndex];
 
         this._thumbnailsBox = new WorkspaceThumbnail.ThumbnailsBox();
         controls.add_actor(this._thumbnailsBox.actor);