diff --git a/src/yunohost/certificate.py b/src/yunohost/certificate.py
index e4d4874e3..5ff88ca4e 100644
--- a/src/yunohost/certificate.py
+++ b/src/yunohost/certificate.py
@@ -43,7 +43,6 @@ from yunohost.utils.network import get_public_ip
 
 from moulinette import m18n
 from yunohost.app import app_ssowatconf
-from yunohost.domain import _get_maindomain
 from yunohost.service import _run_service_command
 from yunohost.regenconf import regen_conf
 from yunohost.log import OperationLogger
@@ -640,6 +639,7 @@ def _prepare_certificate_signing_request(domain, key_file, output_folder):
     # Set the domain
     csr.get_subject().CN = domain
 
+    from yunohost.domain import _get_maindomain
     if domain == _get_maindomain():
         # Include xmpp-upload subdomain in subject alternate names
         subdomain="xmpp-upload." + domain