diff --git a/adm/mail_preview.php b/adm/mail_preview.php
index 1bad00a70..c56de9546 100644
--- a/adm/mail_preview.php
+++ b/adm/mail_preview.php
@@ -1,7 +1,7 @@
 <?
 $sub_menu = "200300";
 include_once('./_common.php');
-include_once($g4['path'].'/lib/mailer.lib.php');
+include_once(G4_LIB_PATH.'/mailer.lib.php');
 
 auth_check($auth[$sub_menu], 'r');