Not working with true cron

Post expirator does not work when wp cron is disabled in wp-config.php
define('DISABLE_WP_CRON', true);

I have a true cron job set to run cron once every hour
wget -q -O - https://www.mydomain.com/wp-cron.php?doing_wp_cron >/dev/null 2>&1

Is there a way I can make that work or do I need to enable WP Cron in wp-config.php