diff --git a/cake/libs/controller/components/request_handler.php b/cake/libs/controller/components/request_handler.php
index f6f4ea574..6e2b70350 100644
--- a/cake/libs/controller/components/request_handler.php
+++ b/cake/libs/controller/components/request_handler.php
@@ -538,9 +538,10 @@ class RequestHandlerComponent extends Object {
 			$this->respondAs($type);
 		}
 
-		if (!in_array(ucfirst($type), $controller->helpers)) {
-			if (file_exists(HELPERS . $type . '.php') || fileExistsInPath(LIBS . 'view' . DS . 'helpers' . DS . $type . '.php')) {
-				$controller->helpers[] = ucfirst($type);
+		$helper = ucfirst($type);
+		if (!in_array($helper, $controller->helpers)) {
+			if (App::import('Helper', $helper)) {
+				$controller->helpers[] = $helper;
 			}
 		}
 	}
diff --git a/cake/tests/cases/libs/controller/components/request_handler.test.php b/cake/tests/cases/libs/controller/components/request_handler.test.php
index 6c6b9dba7..84dd9e0de 100644
--- a/cake/tests/cases/libs/controller/components/request_handler.test.php
+++ b/cake/tests/cases/libs/controller/components/request_handler.test.php
@@ -26,7 +26,7 @@
  * @lastmodified	$Date$
  * @license			http://www.opensource.org/licenses/opengroup.php The Open Group Test Suite License
  */
-uses('controller' . DS . 'components' . DS .'request_handler');
+uses('controller' . DS . 'controller', 'controller' . DS . 'components' . DS .'request_handler');
 /**
  * Short description for class.
  *
@@ -35,8 +35,19 @@ uses('controller' . DS . 'components' . DS .'request_handler');
  */
 class RequestHandlerComponentTest extends CakeTestCase {
 
-	function skip() {
-		$this->skipif (true, 'RequestHandlerComponentTest not implemented');
+	function setUp() {
+		$this->RequestHandler = new RequestHandlerComponent();
+		$this->Controller = new Controller();
+	}
+
+	function testRenderAs() {
+		$this->RequestHandler->renderAs($this->Controller, 'xml');
+		$this->assertEqual($this->Controller->helpers, array('Html', 'Xml'));
+	}
+
+	function tearDown() {
+		unset($this->RequestHandler);
+		unset($this->Controller);
 	}
 }
 ?>
\ No newline at end of file