Custom field IF statement

This code is part of my custom post type template. I am using this statement to check if a custom field tempindi exists in the custom post type.

It seems that the first line doesn't work - it should return TRUE if the custom field exists. Any ideas?

<?php $ashurl = get_post_meta($post->ID, 'tempindi', true); if($ashurl) { ?>
    <div class="main-content-full">
<?php } else { ?>
    <div class="main-content<?php if($reviewSidebarEnabled) { ?>-left<?php } else { ?> full-width<?php } ?>">
<?php }?>