diff --git a/htdocs/core/modules/mailings/contacts1.modules.php b/htdocs/core/modules/mailings/contacts1.modules.php
index 8452dacce1e..1e2af0fcc2f 100644
--- a/htdocs/core/modules/mailings/contacts1.modules.php
+++ b/htdocs/core/modules/mailings/contacts1.modules.php
@@ -93,6 +93,8 @@ class mailing_contacts1 extends MailingTargets
 	 */
 	public function getNbOfRecipients($sql = '')
 	{
+		global $conf;
+
 		$sql = "SELECT count(distinct(c.email)) as nb";
 		$sql .= " FROM ".MAIN_DB_PREFIX."socpeople as c";
 		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."societe as s ON s.rowid = c.fk_soc";