How do I change header link ?

I would like my blog header to point back to the main site not to the main page of the blog.

What do I need to do ?

<div id="headerimg">
		<h1><a href="<?php echo get_option('home'); ?>/"><?php bloginfo('name'); ?></a></h1>
		<div class="description"><?php bloginfo('description'); ?></div>
	</div>