diff --git a/typescript/base/single/button/button.basic.ts b/typescript/base/single/button/button.basic.ts
index 0829e96ea..1c91110c4 100644
--- a/typescript/base/single/button/button.basic.ts
+++ b/typescript/base/single/button/button.basic.ts
@@ -39,7 +39,7 @@ export declare class BasicButton extends Single {
         handler?: Function;
         bubble?: Function | null | string;
         text?: string;
-        el: Obj;
+        el?: Obj;
     } & Single['props'];
 
     _createShadow(): void;