include main app controller only once

[eluser]gerben[/eluser]
Coming from the Cake framework, I find it convenient to create an app-controller for system-wide settings that extends the main CI controller. All my other controllers extend the app controller, rather than the CI controller.

Right now I include my app-controller in every controller that extends it, like so:

Code:

<?php
include("application/app_controller.php");

class SomeController extends AppController {

// etc.

?>

But isn't there an easier way to include this controller in every controller that extends it?