diff --git a/libs/sdk-js/src/auth/index.ts b/libs/sdk-js/src/auth/index.ts
index 5229b43df..c736f5cbb 100644
--- a/libs/sdk-js/src/auth/index.ts
+++ b/libs/sdk-js/src/auth/index.ts
@@ -9,7 +9,7 @@ import type {
 } from "./types.js";
 
 export class Auth<
-  TExtra,
+  TExtra = {},
   TAuthReturn extends BaseAuthReturn = BaseAuthReturn,
   TUser extends BaseUser = ToUserLike<TAuthReturn>,
 > {