diff --git a/phpBB/phpbb/notification/type/base.php b/phpBB/phpbb/notification/type/base.php
index 48b368f7f9..895127f831 100644
--- a/phpBB/phpbb/notification/type/base.php
+++ b/phpBB/phpbb/notification/type/base.php
@@ -550,7 +550,6 @@ abstract class base implements \phpbb\notification\type\type_interface
 		}
 
 		$users = array_unique($users);
-		sort($users);
 
 		$auth_read = $this->auth->acl_get_list($users, 'f_read', $forum_id);