diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 05842ab05b..7ddf1f4d8a 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -735,7 +735,7 @@ class Ostatus_profile extends Managed_DataObject
     {
         $notice = null;
 
-        $profile = $this->checkAuthorship($activity, $this->localProfile());
+        $profile = ActivityUtils::checkAuthorship($activity, $this->localProfile());
 
         // It's not always an ActivityObject::NOTE, but... let's just say it is.