diff --git a/js/ui/windowAttentionHandler.js b/js/ui/windowAttentionHandler.js
index 733103336..2f8204215 100644
--- a/js/ui/windowAttentionHandler.js
+++ b/js/ui/windowAttentionHandler.js
@@ -12,7 +12,7 @@ const WindowAttentionHandler = new Lang.Class({
     _init : function() {
         this._tracker = Shell.WindowTracker.get_default();
         this._windowDemandsAttentionId = global.display.connect('window-demands-attention',
-																 Lang.bind(this, this._onWindowDemandsAttention));
+                                                                Lang.bind(this, this._onWindowDemandsAttention));
     },
 
     _getTitleAndBanner: function(app, window) {