diff --git a/backend/src/ee/services/pki-acme/pki-acme-service.ts b/backend/src/ee/services/pki-acme/pki-acme-service.ts
index a0dbd65b4..0521c2a6d 100644
--- a/backend/src/ee/services/pki-acme/pki-acme-service.ts
+++ b/backend/src/ee/services/pki-acme/pki-acme-service.ts
@@ -43,6 +43,7 @@ import {
   AcmeMalformedError,
   AcmeOrderNotReadyError,
   AcmeServerInternalError,
+  AcmeUnauthorizedError,
   AcmeUnsupportedIdentifierError
 } from "./pki-acme-errors";
 import { buildUrl, extractAccountIdFromKid, validateDnsIdentifier } from "./pki-acme-fns";