diff --git a/phpBB/includes/notification/type/quote.php b/phpBB/includes/notification/type/quote.php
index 5453b267c8..e9eb7bea21 100644
--- a/phpBB/includes/notification/type/quote.php
+++ b/phpBB/includes/notification/type/quote.php
@@ -108,6 +108,7 @@ class phpbb_notification_type_quote extends phpbb_notification_type_post
 		{
 			return array();
 		}
+		sort($users);
 
 		$auth_read = $this->auth->acl_get_list($users, 'f_read', $post['forum_id']);