Missing Method in GenesController

Error: The action favicon.ico is not defined in controller GenesController

Error: Create GenesController::favicon.ico() in file: app/controllers/genes_controller.php.

<?php
class GenesController extends AppController {

	var $name = 'Genes';


	function favicon.ico() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp