diff --git a/typescript/base/single/button/button.basic.ts b/typescript/base/single/button/button.basic.ts
index 9e43dbe53..87f7ba35e 100644
--- a/typescript/base/single/button/button.basic.ts
+++ b/typescript/base/single/button/button.basic.ts
@@ -37,7 +37,7 @@ export declare class BasicButton extends Single {
         isShadowShowingOnSelected?: boolean;
         trigger?: string | null;
         handler?: Function;
-        bubble?: Function | null;
+        bubble?: Function | null | string;
     } & Single['props'];
 
     _createShadow(): void;