diff --git a/backend/src/routes/auth.ts b/backend/src/routes/auth.ts
index 58ce387..60aadfd 100644
--- a/backend/src/routes/auth.ts
+++ b/backend/src/routes/auth.ts
@@ -79,7 +79,7 @@ export const authRouter: FastifyPluginAsync = async (fastify) => {
       }
 
       req.session.user = user;
-      const base = process.env.FRONTEND_URL ?? "http://localhost:5173";
+      const base = process.env.FRONTEND_APP_URL ?? "http://localhost:5173";
       reply.redirect(`${base}?login=1`);
     },
   );