diff --git a/lib/timeline/Timeline.js b/lib/timeline/Timeline.js
index 8abe0182..0d4b62e3 100644
--- a/lib/timeline/Timeline.js
+++ b/lib/timeline/Timeline.js
@@ -70,7 +70,8 @@ function Timeline (container, items, groups, options) {
   } else {
     this.options.rtl = options.rtl;
   } 
-  this.options.rollingMode = options.rollingMode; 
+
+  this.options.rollingMode = options && options.rollingMode; 
 
   // all components listed here will be repainted automatically
   this.components = [];