diff --git a/htdocs/core/modules/mailings/modules_mailings.php b/htdocs/core/modules/mailings/modules_mailings.php
index f35473cd1fd..95850b99969 100644
--- a/htdocs/core/modules/mailings/modules_mailings.php
+++ b/htdocs/core/modules/mailings/modules_mailings.php
@@ -31,6 +31,11 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/functions.lib.php';
  */
 class MailingTargets // This can't be abstract as it is used for some method
 {
+	/**
+	 * @var DoliDB Database handler.
+	 */
+	public $db;
+
 	/**
 	 * @var string	Condition to be enabled
 	 */