civicrm_contribution_get returns type name instead of ID

Code like this:

$params = array('contribution_id' => $contributionID);
require_once('api/v2/Contribute.php');
$contribution = civicrm_contribution_get($params);
echo $contribution['contribution_status_id'];

...will echo the String name for the contribution status, not the ID as the key suggests. Besides being unintuitive, this means that following the above with civicrm_contribution_add($contribution) will fail.