Yoast SEO plugin question – exclude canonical on two pages?

On the thread below someone gave me a great solution to exclude the canonical link that automatically appears through Yoast’s SEO plugin:

http://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-suggestion-remove-canonical-per-post-or-page

I was able to make it work for one page using this code on the plugins functions file:

of function wpseo_canonical_exclude( $canonical ) {
global $post;
if ( $post->ID == xxx) {
$canonical = false;
}
return $canonical;
}
add_filter( ‘wpseo_canonical’, ‘wpseo_canonical_exclude’ );

My problem is that I need to exclude the canonical on one more page, but I don’t know the correct syntax. Everything I’ve tried so far breaks it.