diff --git a/passport-facebook/index.d.ts b/passport-facebook/index.d.ts
index bcc742dae5..7b6cedeac5 100644
--- a/passport-facebook/index.d.ts
+++ b/passport-facebook/index.d.ts
@@ -19,6 +19,10 @@ interface Profile extends passport.Profile {
     _json: any;
 }
 
+export interface AuthenticateOptions extends passport.AuthenticateOptions {
+    authType?: string;
+}
+
 interface IStrategyOption {
     clientID: string;
     clientSecret: string;