diff --git a/mozilla/calendar/providers/caldav/calDavCalendar.js b/mozilla/calendar/providers/caldav/calDavCalendar.js
index 924b4d969ce..44c551981cd 100644
--- a/mozilla/calendar/providers/caldav/calDavCalendar.js
+++ b/mozilla/calendar/providers/caldav/calDavCalendar.js
@@ -377,7 +377,7 @@ calDavCalendar.prototype = {
         aItem.generation = 1;
 
         var httpchannel = calPrepHttpChannel(itemUri,
-                                             aItem.icalString,
+                                             this.getSerializedItem(aItem),
                                              "text/calendar; charset=utf-8",
                                              this);