Changing widget titles to H2

Dear Omega Developer,

Thanks for great theme! I have a small issue – I really need to give widget title H2 class and I am constantly getting syntax error ??

I found this code in lib/functions/hooks.php

function omega_register_sidebars() {
	omega_register_sidebar(
		array(
			'id'          => 'primary',
			'name'        => _x( 'Primary', 'sidebar', 'omega' ),
			'description' => __( 'The main sidebar. It is displayed on either the left or right side of the page based on the chosen layout.', 'omega' )
		)
	);
}

I know I should put before_title and after_title rows there but I am still getting syntax error.

Could you be so kind and help me here? I would really appreciate it!

Thanks, Jan