diff --git a/typescript/base/single/button/buttons/button.icon.ts b/typescript/base/single/button/buttons/button.icon.ts
index c4e6c5da7d..035657bdb0 100644
--- a/typescript/base/single/button/buttons/button.icon.ts
+++ b/typescript/base/single/button/buttons/button.icon.ts
@@ -2,4 +2,5 @@ import { BasicButton } from "../button.basic";
 
 export declare class IconButton extends BasicButton {
     static xtype: string;
+    static EVENT_CHANGE: string;
 }