diff --git a/packages/fineui/typescript/core/base.ts b/packages/fineui/typescript/core/base.ts
index e347747cf..ca7d8e421 100644
--- a/packages/fineui/typescript/core/base.ts
+++ b/packages/fineui/typescript/core/base.ts
@@ -52,9 +52,9 @@ export declare function each<T>(collection: T, iteratee?: any, thisArg?: any): T
 
 export declare function map<T, U>(collection: T[] | object | string | null | undefined, callback?: ((index: number, value: T) => U) | object | string, thisArg?: any): U[];
 
-export declare function reduce<T, U>(collection: T[] | object | string, callback?: ((total: U extends T ? U : T, currentValue: T, currentIndex: number) => U extends T ? U : T) | object | string, initialValue?: U | T): U extends T ? U : T;
+export declare function reduce<T, U>(collection: T[] | object | string, callback?: ((currentValue: T, total: U extends T ? U : T, currentIndex: number) => U extends T ? U : T) | object | string, initialValue?: U | T): U extends T ? U : T;
 
-export declare function reduceRight<T, U>(collection: T[] | object | string, callback?: ((total: U extends T ? U : T, currentValue: T, currentIndex: number) => U extends T ? U : T) | object | string, initialValue?: U | T): U extends T ? U : T;
+export declare function reduceRight<T, U>(collection: T[] | object | string, callback?: ((currentValue: T, total: U extends T ? U : T, currentIndex: number) => U extends T ? U : T) | object | string, initialValue?: U | T): U extends T ? U : T;
 
 export declare function find<T>(collection: T[] | object | string, callback?: ((index: number, value: T) => boolean) | object | string, thisArg?: any): T | undefined;