diff --git a/winjs/winjs.d.ts b/winjs/winjs.d.ts
index 51b159951..0695a1fb3 100644
--- a/winjs/winjs.d.ts
+++ b/winjs/winjs.d.ts
@@ -9774,7 +9774,7 @@ declare namespace WinJS.Utilities {
     /**
      * Represents the result of a query selector, and provides various operations that perform actions over the elements of the collection.
     **/
-    class QueryCollection<T> implements Array<T> {
+    class QueryCollection<T> extends Array<T> {
         //#region Methods
 
         /**