diff --git a/calendar/providers/caldav/calDavCalendar.js b/calendar/providers/caldav/calDavCalendar.js
index 637d81492c4c..a657f77031f4 100644
--- a/calendar/providers/caldav/calDavCalendar.js
+++ b/calendar/providers/caldav/calDavCalendar.js
@@ -1108,7 +1108,7 @@ calDavCalendar.prototype = {
             }
         }
 
-        var res = new WebDavResource(this.mUri);
+        var res = new WebDavResource(this.mCalendarUri);
         var webSvc = Cc['@mozilla.org/webdav/service;1'].
                      getService(Ci.nsIWebDAVService);
         try {