diff --git a/htdocs/core/class/smtps.class.php b/htdocs/core/class/smtps.class.php
index 81b90e9ce89..c5694eeae94 100644
--- a/htdocs/core/class/smtps.class.php
+++ b/htdocs/core/class/smtps.class.php
@@ -458,6 +458,7 @@ class SMTPs
 		// phpcs:enable
 		global $conf;
 
+		require_once DOL_DOCUMENT_ROOT.'/core/lib/geturl.lib.php';
 		// Send the RFC2554 specified EHLO.
 		// This improvment as provided by 'SirSir' to
 		// accomodate both SMTP AND ESMTP capable servers