diff --git a/typescript/base/single/html/html.ts b/typescript/base/single/html/html.ts
index aaea2b0ea..f44bb6432 100644
--- a/typescript/base/single/html/html.ts
+++ b/typescript/base/single/html/html.ts
@@ -1,6 +1,8 @@
 import { Single } from "../single";
 
 export declare class Html extends Single {
+    static xtype: string;
+
     doHighLight(): void;
 
     unHighLight(): void;