diff --git a/UI/WebServerResources/UIxAppointmentEditor.js b/UI/WebServerResources/UIxAppointmentEditor.js
index 5f793d362..e66c4303e 100644
--- a/UI/WebServerResources/UIxAppointmentEditor.js
+++ b/UI/WebServerResources/UIxAppointmentEditor.js
@@ -339,6 +339,7 @@ function refreshAttendeesRO () {
   var attendeesEmails = $("attendeesEmails").value.split(",");
   var attendeesStates = $("attendeesStates").value.split(",");
   var attendeesMenu = $("attendeesMenu");
+  var attendeesLabel = $("attendeesLabel");
 
   if (attendeesMenu) {
     for (var i = 0; i < attendeesMenu.childNodes.length; i++)