diff --git a/shiny/Shuttle-v2/shuttle-stop-picker.html b/shiny/Shuttle-v2/shuttle-stop-picker.html
index e204f4a..c7351d8 100644
--- a/shiny/Shuttle-v2/shuttle-stop-picker.html
+++ b/shiny/Shuttle-v2/shuttle-stop-picker.html
@@ -120,7 +120,7 @@
           <template repeat="{{groups}}">
             <polymer-ui-collapsible active="{{active}}" class="group">
               <div class="polymer-ui-collapsible-header group-header">
-                <polymer-ui-icon-button icon="dropdown" src="assets/ic_arrow_triangledown_darkreg.png" class="{{active: active}}"></polymer-ui-icon-button>
+                <polymer-ui-icon-button icon="dropdown" src="assets/ic_arrow_triangledown_darkreg.png" class="{{{active: active} | tokenList}}"></polymer-ui-icon-button>
                 {{name}}
               </div>
               <template repeat="{{stops}}">