Fatal error in CRM/Utils/REST.php

rev 36995 included a change that now causes a Fatal error:

CRM/Utils/REST.php, line 562 changed from
$api_key = CRM_Utils_Request::retrieve( 'api_key', 'String', $store, false, null, 'REQUEST' );
to
$api_key = CRM_::retrieve( 'api_key', 'String', $store, false, null, 'REQUEST' );

This is obviously wrong and causes the following error message upon execution:
Fatal error: Class 'CRM_' not found in C:\wamp\www\civi411s\CRM\Utils\REST.php on line 564