Adding Code for Pages

The following code is in my content.php (child theme) and it returns 5 related posts based on tags.

<?php
//for use in the loop, list 5 post titles related to first tag on current post
$tags = wp_get_post_tags($post->ID);
if ($tags) {

$first_tag = $tags[0]->term_id;
$args=array(
'tag__in' => array($first_tag),
'post__not_in' => array($post->ID),
'posts_per_page'=>5,
'caller_get_posts'=>1
);
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
?>
<related class="related">
<?php
echo '<h3>You May Also Enjoy...</h3>';
while ($my_query->have_posts()) : $my_query->the_post(); ?>

<ul><li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li></ul>
<?php
endwhile;
?>
</related>
<?php
}
wp_reset_query();
}
?>

I need to add Pages to the code so on my Pages it returns the 5 related based on tag.

Suggestions?