diff --git a/mozilla/calendar/import-export/calIcsImportExport.js b/mozilla/calendar/import-export/calIcsImportExport.js
index 31386180bd9..c187af1fbb5 100644
--- a/mozilla/calendar/import-export/calIcsImportExport.js
+++ b/mozilla/calendar/import-export/calIcsImportExport.js
@@ -156,7 +156,7 @@ function ics_exportToStream(aStream, aCount, aItems) {
                        .getService(Components.interfaces.calIICSService);
     var calComp = icssrv.createIcalComponent("VCALENDAR");
     calComp.version = "2.0";
-    calComp.prodid = "-//Mozilla.org/NONSGML Mozilla Calendar V1.0//EN";
+    calComp.prodid = "-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN";
     
     for each (item in aItems) {
         calComp.addSubcomponent(item.icalComponent);
diff --git a/mozilla/calendar/resources/content/clipboard.js b/mozilla/calendar/resources/content/clipboard.js
index 84a71e84992..603af04209e 100644
--- a/mozilla/calendar/resources/content/clipboard.js
+++ b/mozilla/calendar/resources/content/clipboard.js
@@ -125,7 +125,7 @@ function copyToClipboard( calendarItemArray )
                        .getService(Components.interfaces.calIICSService);
     var calComp = icssrv.createIcalComponent("VCALENDAR");
     calComp.version = "2.0";
-    calComp.prodid = "-//Mozilla.org/NONSGML Mozilla Calendar V1.0//EN";
+    calComp.prodid = "-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN";
 
     for each (item in calendarItemArray) {
         // If we copy an item and paste it again, it will have the same ID as