diff --git a/whatwg-fetch/whatwg-fetch-tests.ts b/whatwg-fetch/whatwg-fetch-tests.ts
index a7ba5d05c..3f29746ed 100644
--- a/whatwg-fetch/whatwg-fetch-tests.ts
+++ b/whatwg-fetch/whatwg-fetch-tests.ts
@@ -28,6 +28,17 @@ function test_fetchUrl() {
 	handlePromise(window.fetch("http://www.andlabs.net/html5/uCOR.php"));
 }
 
+function test_fetchUrlWithRequestObject() {
+	var requestOptions: RequestInit = {
+		method: "POST",
+		headers: {
+			'Content-Type': 'application/json'
+		}
+	};
+	var request: Request = new Request("http://www.andlabs.net/html5/uCOR.php", requestOptions);
+	handlePromise(window.fetch(request));
+}
+
 function handlePromise(promise: Promise<Response>) {
 	promise.then((response) => {
 		if (response.type === 'basis') {
diff --git a/whatwg-fetch/whatwg-fetch.d.ts b/whatwg-fetch/whatwg-fetch.d.ts
index f98fb5985..4d47904a2 100644
--- a/whatwg-fetch/whatwg-fetch.d.ts
+++ b/whatwg-fetch/whatwg-fetch.d.ts
@@ -80,5 +80,5 @@ declare type BodyInit = Blob|FormData|string;
 declare type RequestInfo = Request|string;
 
 interface Window {
-	fetch(url: string, init?: RequestInit): Promise<Response>;
+	fetch(url: string|Request, init?: RequestInit): Promise<Response>;
 }