diff --git a/app/index.html b/app/index.html
index f2fb086e..de6e4caf 100644
--- a/app/index.html
+++ b/app/index.html
@@ -60,7 +60,10 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
 </head>
 
 <body unresolved>
+  <!-- build:remove -->
   <span id="browser-sync-binding"></span>
+  <!-- endbuild -->
+
   <template is="dom-bind" id="app">
 
     <paper-drawer-panel id="paperDrawerPanel">
