diff --git a/apps/tests/xhr-tests.ts b/apps/tests/xhr-tests.ts
index f10f8075a..912a2e0e4 100644
--- a/apps/tests/xhr-tests.ts
+++ b/apps/tests/xhr-tests.ts
@@ -134,7 +134,7 @@ export var test_XMLHttpRequest_FormDataContentSentAndReceivedProperly = function
     data.append("MyVariableOne", "ValueOne");
     data.append("MyVariableTwo", "ValueTwo");
 
-    xhr.send(<any>data);
+    xhr.send(data);
 };
 
 export var test_XMLHttpRequest_abortShouldCancelonreadystatechange = function (done) {
diff --git a/declarations.d.ts b/declarations.d.ts
index 91eb4ca7d..1bb97cf9f 100644
--- a/declarations.d.ts
+++ b/declarations.d.ts
@@ -1,4 +1,8 @@
 /* tslint:disable:no-unused-variable */
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    send(data?: FormData): void;
+}
+
 interface Console {
     time(reportName: string): void;
     timeEnd(reportName: string): void;