diff --git a/types/passport/index.d.ts b/types/passport/index.d.ts
index 815ee68b65e49d..ddda8bfcb67fa2 100644
--- a/types/passport/index.d.ts
+++ b/types/passport/index.d.ts
@@ -69,8 +69,8 @@ declare namespace passport {
         initialize(options?: { userProperty: string; }): InitializeRet;
         session(options?: { pauseStream: boolean; }): AuthenticateRet;
 
-        authenticate(strategy: string | string[], callback?: (...args: any[]) => any): AuthenticateRet;
-        authenticate(strategy: string | string[], options: AuthenticateOptions, callback?: (...args: any[]) => any): AuthenticateRet;
+        authenticate(strategy: string | string[] | Strategy, callback?: (...args: any[]) => any): AuthenticateRet;
+        authenticate(strategy: string | string[] | Strategy, options: AuthenticateOptions, callback?: (...args: any[]) => any): AuthenticateRet;
         authorize(strategy: string | string[], callback?: (...args: any[]) => any): AuthorizeRet;
         authorize(strategy: string | string[], options: AuthorizeOptions, callback?: (...args: any[]) => any): AuthorizeRet;
         serializeUser<TUser, TID>(fn: (user: TUser, done: (err: any, id?: TID) => void) => void): void;