diff --git a/www/js/my.full.js b/www/js/my.full.js
index 8dc500a846..baa0e57a5a 100755
--- a/www/js/my.full.js
+++ b/www/js/my.full.js
@@ -993,7 +993,7 @@ function toggleFold(form, unfoldIdList, objectID, objectType)
     $parentTd = $form.find('td.has-child');
     if($parentTd.length == 0) return false;
 
-    var toggleClass = ['product', 'requirement'].includes(objectType) ? 'story-toggle' : 'task-toggle';
+    var toggleClass = ['product', 'requirement', 'story'].indexOf(objectType) !== -1 ? 'story-toggle' : 'task-toggle';
     var nameClass   = ['product', 'productplan'].indexOf(objectType) !== -1 ? 'c-title' : 'c-name';
     $form.find('th.' + nameClass).addClass('clearfix').append("<span id='toggleFold' class='collapsed'><i  class='icon icon-angle-double-right'></i></span>");