Wordpress: Future custom "event" posts ordered by meta value "start date"

<?php
$loop = new WP_Query( array( 'post_type' => 'event', 'posts_per_page' => -1, 'orderby' => 'meta_value', 'meta_key' => 'start-date', 'order' => 'ASC', 'post_status' => 'future'  ) );
while ( $loop->have_posts() ) : $loop->the_post();
 ?>

        <h3><?php the_title(); ?></h3>
        <!-- Other post stuff -->

<?php

endwhile; ?>