Prevent front page navigation highlighting

I have had a wordpress theme developed for me and I can’t get hold of the developer to do further changes. I have one small query that I hope some clever person can assist with.

Currently the navigation list that appears on my front page has the most recent post highlighted in it. However I don’t want this. Below is the code that I think it generating it. Is there an easy way I can change this so that on the front page it doesn’t highlight the latest post in the list?

<li<?php echo((!is_front_page() AND $post->ID == $wp_query->post->ID) ? ' class="selected"' : ''); ?>>
                                <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>
                            </li>