Realted posts in wordpress custom post type

<?php

$backup = $post; 
$current = $post->ID; //current page ID

global $post;
$thisPost = get_post_type(); //current custom post
$myposts = get_posts('numberposts=3&order=DESC&orderby=ID&post_type=' . $thisPost .  
'&exclude=' . $current);

$check = count($myposts);

if ($check > 1 ) { ?>
<h1 id="recent">Related</h1>
<div id="related" class="group">
    <ul class="group">
    <?php   
        foreach($myposts as $post) :
            setup_postdata($post);
    ?>
        <li>
            <a href="<?php the_permalink() ?>" title="<?php the_title() ?>" rel="bookmark">
                <article>
                    <h1 class="entry-title"><?php the_title() ?></h1>
                    <div class="name-date"><?php the_time('F j, Y'); ?></div>
                    <div class="theExcerpt"><?php the_excerpt(); ?></div>
                </article>
            </a>
        </li>

    <?php endforeach; ?>
    </ul>
<?php
    $post = $backup; 
    wp_reset_query();
?>

</div><!-- #related -->
<?php } ?>