Display Custom Post Type in WordPress Author Archive

functions.php

<?php
//* Add this to your functions.php file. Do NOT include the opening php tag

// Display Custom Post Type in Author Archive
function post_types_author_archives($query) {
    if ($query->is_author)
    // Allow 'my_custom_post_type' CPT and the default 'posts' to display in author's archive
    $query->set( 'post_type', array('my_custom_post_type', 'posts') );
    remove_action( 'pre_get_posts', 'custom_post_author_archive' );
    }
    add_action('pre_get_posts', 'post_types_author_archives');