diff --git a/ts4.1/index.d.ts b/ts4.1/index.d.ts
index 46603fc91af1daa3fd4c7905296e978e5889740c..dd4fbb809fca2901c098126950dd3fa97f773bc5 100644
--- a/ts4.1/index.d.ts
+++ b/ts4.1/index.d.ts
@@ -191,7 +191,7 @@ export interface TFunction<
   >(
     key: TKeys | TKeys[],
     options?: TOptions<TInterpolationMap> | string,
-  ): TFuncReturn<N, TKeys, TDefaultResult>;
+  ): string;
   <
     TKeys extends TFuncKey<N, TKPrefix> | TemplateStringsArray extends infer A ? A : never,
     TDefaultResult extends TFunctionResult = string,
@@ -200,7 +200,7 @@ export interface TFunction<
     key: TKeys | TKeys[],
     defaultValue?: string,
     options?: TOptions<TInterpolationMap> | string,
-  ): TFuncReturn<N, TKeys, TDefaultResult>;
+  ): string;
 }
 
 export interface TransProps<
