diff --git a/lib/timeline/component/ItemSet.js b/lib/timeline/component/ItemSet.js
index a278fba9..23798ecf 100644
--- a/lib/timeline/component/ItemSet.js
+++ b/lib/timeline/component/ItemSet.js
@@ -546,7 +546,7 @@ ItemSet.prototype.getVisibleItems = function() {
   for (var groupId in this.groups) {
     if (this.groups.hasOwnProperty(groupId)) {
       var group = this.groups[groupId];
-      var rawVisibleItems = group.visibleItems;
+      var rawVisibleItems = group.isVisible ? group.visibleItems : [];
 
       // filter the "raw" set with visibleItems into a set which is really
       // visible by pixels