diff --git a/htdocs/public/emailing/mailing-unsubscribe.php b/htdocs/public/emailing/mailing-unsubscribe.php
index 4595e8aeb5f..9f2cf060841 100644
--- a/htdocs/public/emailing/mailing-unsubscribe.php
+++ b/htdocs/public/emailing/mailing-unsubscribe.php
@@ -29,7 +29,7 @@ define("NOLOGIN",1);		// This means this output page does not require to be logg
 define("NOCSRFCHECK",1);	// We accept to go on this page from external web site.
 
 require '../../main.inc.php';
-dol_include_once('/core/lib/company.lib.php');
+require_once DOL_DOCUMENT_ROOT.'/core/lib/company.lib.php';
 
 global $user, $conf, $langs;