diff --git a/core/modules/toolbar/js/toolbar.js b/core/modules/toolbar/js/toolbar.js
index 7249f06..9af7f5b 100755
--- a/core/modules/toolbar/js/toolbar.js
+++ b/core/modules/toolbar/js/toolbar.js
@@ -56,9 +56,12 @@ Drupal.behaviors.toolbar = {
           toolbar.mediaQueryChangeHandler(mql);
         }
       }
+      //adding an active-trail class to the interactive menu for later styling.
+      jQuery('.interactive-menu a.active').parents('.interactive-menu li').addClass('active-trail');
       // Assign the toolbar to the Drupal global object.
       Drupal.toolbar = toolbar;
     }
+
   },
   options: {
     breakpoints: null