diff --git a/classes/User.php b/classes/User.php
index 7533110fea..8d21d2bc19 100644
--- a/classes/User.php
+++ b/classes/User.php
@@ -1187,7 +1187,7 @@ class User extends Managed_DataObject
 
         $service = new ActivityObject();
 
-        $service->type  = "service";
+        $service->type  = ActivityObject::SERVICE;
         $service->title = common_config('site', 'name');
         $service->link  = common_root_url();
         $service->id    = $service->link;
@@ -1207,9 +1207,8 @@ class User extends Managed_DataObject
         $act->title = _("Register");
 
         $act->content = sprintf(_('%1$s joined %2$s.'),
-                               $profile->getBestName(),
-                               $service->displayName);
-
+                                $profile->getBestName(),
+                                $service->title);
         return $act;
     }
 }