diff --git a/controllets/fullsize-page-with-card-controllet/fullsize-page-with-card-controllet.html b/controllets/fullsize-page-with-card-controllet/fullsize-page-with-card-controllet.html
index eef172b..e065d51 100755
--- a/controllets/fullsize-page-with-card-controllet/fullsize-page-with-card-controllet.html
+++ b/controllets/fullsize-page-with-card-controllet/fullsize-page-with-card-controllet.html
@@ -38,7 +38,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
         <div id="fixed" class="fixed" style$="background-color:{{color}}"></div>
         <div id="card" class="card" style$="background-color:{{color}}">
             <template is="dom-if" if="{{_checkUndefined(publicRoom)}}">
-                <iframe id="public_room_iframe" src="public-room/{{publicRoom}}" width="100%" height="100%"></iframe>
+                <iframe id="public_room_iframe" src="/public-room/{{publicRoom}}" width="100%" height="100%"></iframe>
             </template>
         </div>