Add Destination Query to Drupal Links

How to add ?=destination=URL to a Drupal link with l().

 // Attach destination to login links.
$options = array();
$destination = request_path();
if ($destination) {
  $options['query'] = array('destination' => $destination);
}
$my_link =  l('Log in', 'user', $options);
print $my_link; // Outputs the link with ?destination=CURRENT_RELATIVE_PATH attached