diff --git a/backend/services/reward-service/src/application/services/reward-application.service.ts b/backend/services/reward-service/src/application/services/reward-application.service.ts
index 9375ca44..b85bbf7c 100644
--- a/backend/services/reward-service/src/application/services/reward-application.service.ts
+++ b/backend/services/reward-service/src/application/services/reward-application.service.ts
@@ -457,7 +457,7 @@ export class RewardApplicationService {
       hashpowerAmount: r.hashpowerAmount.value,
       createdAt: r.createdAt,
       claimedAt: r.claimedAt,
-      sourceOrderNo: r.sourceOrderNo,
+      sourceOrderNo: r.rewardSource.sourceOrderNo,
       memo: r.memo,
     }));
   }