diff --git a/addons/web/static/src/js/views/list/list_controller.js b/addons/web/static/src/js/views/list/list_controller.js
index 05cc352098e..d7816491fbd 100644
--- a/addons/web/static/src/js/views/list/list_controller.js
+++ b/addons/web/static/src/js/views/list/list_controller.js
@@ -708,7 +708,7 @@ var ListController = BasicController.extend({
      * @param {OdooEvent} ev
      */
     _onToggleGroup: function (ev) {
-        event.stopPropagation();
+        ev.stopPropagation();
         var self = this;
         this.model
             .toggleGroup(ev.data.group.id)