diff --git a/backend/services/identity-service/src/domain/events/index.ts b/backend/services/identity-service/src/domain/events/index.ts
index 8adb0512..38a5ce0b 100644
--- a/backend/services/identity-service/src/domain/events/index.ts
+++ b/backend/services/identity-service/src/domain/events/index.ts
@@ -35,7 +35,7 @@ export class UserAccountCreatedEvent extends DomainEvent {
       userId: string;
       accountSequence: string; // 格式: D + YYMMDD + 5位序号
       referralCode: string; // 用户的推荐码（由 identity-service 生成）
-      phoneNumber: string;
+      phoneNumber: string | null; // 手机号可能为空（如钱包重试场景）
       initialDeviceId: string;
       inviterSequence: string | null; // 格式: D + YYMMDD + 5位序号
       registeredAt: Date;