diff --git a/ts4.1/index.d.ts b/ts4.1/index.d.ts
index 46603fc9..2a56f8f0 100644
--- a/ts4.1/index.d.ts
+++ b/ts4.1/index.d.ts
@@ -203,8 +203,8 @@ export interface TFunction<
   ): TFuncReturn<N, TKeys, TDefaultResult>;
 }
 
+type I18nKeyType<N extends Namespace> = TFuncKey<N> extends infer A ? A : never;
 export interface TransProps<
-  K extends TFuncKey<N> extends infer A ? A : never,
   N extends Namespace = DefaultNamespace,
   E extends Element = HTMLDivElement
 > extends React.HTMLProps<E> {
@@ -213,18 +213,17 @@ export interface TransProps<
   count?: number;
   defaults?: string;
   i18n?: i18n;
-  i18nKey?: K | K[];
+  i18nKey?: I18nKeyType<N> | I18nKeyType<N>[];
   ns?: N;
   parent?: string | React.ComponentType<any> | null; // used in React.createElement if not null
   tOptions?: {};
   values?: {};
   t?: TFunction<N>;
 }
-export function Trans<
-  K extends TFuncKey<N> extends infer A ? A : never,
-  N extends Namespace = DefaultNamespace,
-  E extends Element = HTMLDivElement
->(props: TransProps<K, N, E>): React.ReactElement;
+
+export function Trans<N extends Namespace = DefaultNamespace, E extends Element = HTMLDivElement>(
+  props: TransProps<N, E>,
+): React.ReactElement;
 
 export function useSSR(initialI18nStore: Resource, initialLanguage: string): void;