diff --git a/backend/src/routes/loyalty.ts b/backend/src/routes/loyalty.ts
index ba392e1..9fc54cb 100644
--- a/backend/src/routes/loyalty.ts
+++ b/backend/src/routes/loyalty.ts
@@ -207,7 +207,7 @@ const loyaltyRoutes: FastifyPluginAsync = async (fastify) => {
       await db.query(
         `INSERT INTO loyalty_transactions (hotel_id, guest_id, amount, reason, notes, staff_id)
          VALUES ($1, $2, $3, $4, $5, $6)`,
-        [hotelId, guestId, amount, reason, notes ?? null, request.user.userId ?? null],
+        [hotelId, guestId, amount, reason, notes ?? null, request.user.sub ?? null],
       )
 
       return {