File: admin/includes/languages/english/login.php

define('LOGIN_EXPIRY_NOTICE', 'Please be aware that after 15 minutes of inactivity, you will be required to login again.<br /><br />Note: All passwords expire every 90 days.');


Should be

define('LOGIN_EXPIRY_NOTICE', 'Please be aware that after ' . SESSION_TIMEOUT_ADMIN . ' minutes of inactivity, you will be required to login again.<br /><br />Note: All passwords expire every 90 days.');