diff --git a/packages/backend/src/server/api/integration/GithubServerService.ts b/packages/backend/src/server/api/integration/GithubServerService.ts
index 3aa04f72e..186748dab 100644
--- a/packages/backend/src/server/api/integration/GithubServerService.ts
+++ b/packages/backend/src/server/api/integration/GithubServerService.ts
@@ -13,8 +13,8 @@ import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { MetaService } from '@/core/MetaService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { FastifyReplyError } from '@/misc/fastify-reply-error.js';
-import { SigninService } from '../SigninService.js';
 import { bindThis } from '@/decorators.js';
+import { SigninService } from '../SigninService.js';
 
 @Injectable()
 export class GithubServerService {
@@ -227,7 +227,7 @@ export class GithubServerService {
 					'Authorization': `bearer ${accessToken}`,
 				})) as Record<string, unknown>;
 
-				if (typeof login !== 'string' || typeof id !== 'string') {
+				if (typeof login !== 'string' || typeof id !== 'number') {
 					throw new FastifyReplyError(400, 'invalid session');
 				}