designophobia

I have the following code:

<?php $terms = get_the_terms( $post->ID , 'people' );
	if($terms) {
		foreach( $terms as $term ) {
		echo '<div class="authorbio">'.$term->description.'<br /></div>';
	}
}
?>

I only have descriptions on certain custom tags. I don’t want to display the “authorbio” divs when the description is missing. How do I do it?