--- a/mailnews/addrbook/src/nsAbOSXDirectory.mm
+++ b/mailnews/addrbook/src/nsAbOSXDirectory.mm
@@ -104,17 +104,19 @@ Sync(NSString *aUid)
   ABRecord *card = [addressBook recordForUniqueId:aUid];
   if ([card isKindOfClass:[ABGroup class]])
   {
     nsCOMPtr<nsIAbDirectory> directory;
     GetOrCreateGroup(aUid, getter_AddRefs(directory));
     nsCOMPtr<nsIAbOSXDirectory> osxDirectory =
       do_QueryInterface(directory);
     
-    osxDirectory->Update();
+    if (osxDirectory) {
+      osxDirectory->Update();
+    }
   }
   else {
     nsCOMPtr<nsIAbCard> abCard;
     nsresult rv;
 
     nsCOMPtr<nsIAbManager> abManager = do_GetService(NS_ABMANAGER_CONTRACTID, &rv);
     NS_ENSURE_SUCCESS(rv, rv);