diff --git a/UI/WebServerResources/js/Scheduler/sgFreebusy.directive.js b/UI/WebServerResources/js/Scheduler/sgFreebusy.directive.js
index 423808c74..09745aabf 100644
--- a/UI/WebServerResources/js/Scheduler/sgFreebusy.directive.js
+++ b/UI/WebServerResources/js/Scheduler/sgFreebusy.directive.js
@@ -38,7 +38,7 @@
           } : null;
         },
         function(newAttrs, oldAttrs) {
-          if (newAttrs.attendees) {
+          if (newAttrs && newAttrs.attendees) {
             // Attendees have changed
             $q.all(_.values($ctrl.component.$attendees.$futureFreebusyData)).then(function() {
               $ctrl.onUpdate();