diff --git a/htdocs/holiday/card_group.php b/htdocs/holiday/card_group.php
index 8de636da6c8..b63a3ae657b 100644
--- a/htdocs/holiday/card_group.php
+++ b/htdocs/holiday/card_group.php
@@ -264,7 +264,7 @@ if (empty($reshook)) {
 				/** GROUPS */
 				$sql = ' SELECT DISTINCT u.rowid,u.lastname,u.firstname from ' . MAIN_DB_PREFIX . 'user as  u';
 				$sql .= ' LEFT JOIN  ' . MAIN_DB_PREFIX . 'usergroup_user as ug on ug.fk_user = u.rowid  ';
-				$sql .= ' WHERE  fk_usergroup in (' .$this->db->sanitize(implode(',', $groups)) . ')';
+				$sql .= ' WHERE  fk_usergroup in (' .$db->sanitize(implode(',', $groups)) . ')';
 				$resql = $db->query($sql);
 
 				if ($resql) {