diff --git a/modules/@angular/platform-browser/src/browser/browser_adapter.ts b/modules/@angular/platform-browser/src/browser/browser_adapter.ts
index 4aaa307555bc87..16571a5e17444c 100644
--- a/modules/@angular/platform-browser/src/browser/browser_adapter.ts
+++ b/modules/@angular/platform-browser/src/browser/browser_adapter.ts
@@ -399,7 +399,7 @@ export class BrowserDomAdapter extends GenericBrowserDomAdapter {
   }
   cancelAnimationFrame(id: number) { window.cancelAnimationFrame(id); }
   supportsWebAnimation(): boolean {
-    return isFunction((document as any /** TODO #9100 */).body['animate']);
+    return isFunction((<any>Element).prototype['animate']);
   }
   performanceNow(): number {
     // performance.now() is not available in all browsers, see