diff --git a/packages/backend/src/core/entities/SigninEntityService.ts b/packages/backend/src/core/entities/SigninEntityService.ts
index 8c88e8560a70..6bde3e589ad2 100644
--- a/packages/backend/src/core/entities/SigninEntityService.ts
+++ b/packages/backend/src/core/entities/SigninEntityService.ts
@@ -7,10 +7,12 @@ import { Injectable } from '@nestjs/common';
 import type { } from '@/models/Blocking.js';
 import type { MiSignin } from '@/models/Signin.js';
 import { bindThis } from '@/decorators.js';
+import { IdService } from '@/core/IdService.js';
 
 @Injectable()
 export class SigninEntityService {
 	constructor(
+		private idService: IdService,
 	) {
 	}
 
@@ -18,7 +20,13 @@ export class SigninEntityService {
 	public async pack(
 		src: MiSignin,
 	) {
-		return src;
+		return {
+			id: src.id,
+			createdAt: this.idService.parse(src.id).date.toISOString(),
+			ip: src.ip,
+			headers: src.headers,
+			success: src.success,
+		};
 	}
 }