diff --git a/packages/fineui/typescript/case/button/icon/icon.change.ts b/packages/fineui/typescript/case/button/icon/icon.change.ts
index 717273487..3220bb65f 100644
--- a/packages/fineui/typescript/case/button/icon/icon.change.ts
+++ b/packages/fineui/typescript/case/button/icon/icon.change.ts
@@ -6,7 +6,7 @@ export declare class IconChangeButton extends Single {
     static EVENT_CHANGE: string;
 
     props: {
-        iconCls: string;
+        iconCls: string | (() => string);
     } & IconButton['props']
 
     isSelected(): boolean;