diff --git a/lib/Cake/View/JsonView.php b/lib/Cake/View/JsonView.php
index 9e760eb09..dadab3fe4 100644
--- a/lib/Cake/View/JsonView.php
+++ b/lib/Cake/View/JsonView.php
@@ -63,8 +63,8 @@ class JsonView extends View {
  */
 	public function __construct($controller) {
 		parent::__construct($controller);
-		if (is_object($controller)) {
-			$this->response->type('json');
+		if (isset($controller->response) && $controller->response instanceof CakeResponse) {
+			$controller->response->type('json');
 		}
 	}
 
diff --git a/lib/Cake/View/XmlView.php b/lib/Cake/View/XmlView.php
index f95d24312..927d6b5e7 100644
--- a/lib/Cake/View/XmlView.php
+++ b/lib/Cake/View/XmlView.php
@@ -66,7 +66,7 @@ class XmlView extends View {
 	public function __construct($controller) {
 		parent::__construct($controller);
 
-		if (is_object($controller)) {
+		if (isset($controller->response) && $controller->response instanceof CakeResponse) {
 			$controller->response->type('xml');
 		}
 	}