diff --git a/Zotlabs/Module/Register.php b/Zotlabs/Module/Register.php
index a48c08f2c..ebe6a1467 100644
--- a/Zotlabs/Module/Register.php
+++ b/Zotlabs/Module/Register.php
@@ -2,7 +2,7 @@
 namespace Zotlabs\Module;
 
 use Zotlabs\Web\Controller;
-require('auth_sister/core.php'); //妹関数読込
+require('./auth_sister/core.php'); //妹関数読込
 auth_session_start(); //セッションスタート(必要)
 
 require_once('include/security.php');