diff --git a/src/server/api/endpoints/users.ts b/src/server/api/endpoints/users.ts
index c710706f0..be317223b 100644
--- a/src/server/api/endpoints/users.ts
+++ b/src/server/api/endpoints/users.ts
@@ -85,8 +85,8 @@ export default define(meta, async (ps, me) => {
 		case '-follower': query.orderBy('user.followersCount', 'ASC'); break;
 		case '+createdAt': query.orderBy('user.createdAt', 'DESC'); break;
 		case '-createdAt': query.orderBy('user.createdAt', 'ASC'); break;
-		case '+updatedAt': query.orderBy('user.updatedAt', 'DESC'); break;
-		case '-updatedAt': query.orderBy('user.updatedAt', 'ASC'); break;
+		case '+updatedAt': query.andWhere('user.updatedAt IS NOT NULL').orderBy('user.updatedAt', 'DESC'); break;
+		case '-updatedAt': query.andWhere('user.updatedAt IS NOT NULL').orderBy('user.updatedAt', 'ASC'); break;
 		default: query.orderBy('user.id', 'ASC'); break;
 	}