How can I change the order of TITLE and SITE_TAGLINE in the page title?

[justdoitrocky]

I known in the

/includes/languages/english/meta_tags.php

have definition:

// page title
define('TITLE', 'sitename);

// Site Tagline
define('SITE_TAGLINE', 'you site tagline');

Then the site homepage title will be: sitename, you site tagline

I want it change to: you site tagline, sitename.

anybody known how to make the change?