[development] ugly ?page=1 from theme_pager()

Hello, all Calling theme_pager results in www.mysite.com/mylisting/?page=1 addition to the url. How is it possible to make it like this: www.mysite.com/mylisting/page/1 ? Please - any ideas or just "right directions" :) I use Drupal 4.7rc3 and pathauto -- Dmitry