diff --git a/htdocs/install/upgrade2.php b/htdocs/install/upgrade2.php
index ffd109adb1b..88e0d561247 100644
--- a/htdocs/install/upgrade2.php
+++ b/htdocs/install/upgrade2.php
@@ -89,7 +89,7 @@ if (isset($_POST['action']) && $_POST['action'] == 'upgrade')
 	$conf->db->user = $dolibarr_main_db_user;
 	$conf->db->pass = $dolibarr_main_db_pass;
 
-	$db = new DoliDb($conf->db->type,$conf->db->host,$conf->db->user,$conf->db->pass,$conf->db->name);
+	$db = new DoliDb($conf->db->type,$conf->db->host,$conf->db->user,$conf->db->pass,$conf->db->name,$conf->db->port);
 	if ($db->connected != 1)
 	{
 		print '<tr><td colspan="4">'.$langs->trans("ErrorFailedToConnectToDatabase",$conf->db->name).'</td><td align="right">'.$langs->trans('Error').'</td></tr>';