diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index c11eb771b5b5..c02601e97723 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -361,8 +361,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 
 		// #region Shrimpia
 		if (user.host != null && mentionedUsers.length > 0) {
-			const userEntity = await this.usersRepository.findOneByOrFail({ id: user.id });
-			if (userEntity.followersCount === 0) {
+			const userEntity = await this.usersRepository.findOneBy({ id: user.id });
+			if ((userEntity?.followersCount ?? 0) === 0) {
 				throw new Error('Temporarily, notes including mentions from remote users which no followers are not allowed');
 			}
 		}