Adding Custom Post Type Support

I am aware that I am support to add ‘yarpp_support’ => true when registering my custom post type, but mine looks a little different. I am using the MIES theme and the area where it registers the post type looks like this:

if ( isset( $theme['post_types'] ) && is_array( $theme['post_types'] ) ) {
		foreach ( $theme['post_types'] as $post_type => $post_type_args ) {
			// eliminate the theme prefix
			$post_type_key = strstr( $post_type, '_');
			$post_type_key = substr($post_type_key, 1);
			if ( isset($options["enable_" . $post_type_key ]) ){
				$options['display_settings'] = true;
				if ( $options["enable_" . $post_type_key] ) {
					register_post_type( $post_type, $post_type_args  );
				}
			}
		}
	}

I changed the register_post_type line to look like this but it did not work
register_post_type( $post_type, $post_type_args, array('yarpp_support' => true) );

https://wordpress.org/plugins/yet-another-related-posts-plugin/