diff --git a/users_ldap_groups/models/res_company_ldap.py b/users_ldap_groups/models/res_company_ldap.py
index f4614c2518..6fcf160aa7 100644
--- a/users_ldap_groups/models/res_company_ldap.py
+++ b/users_ldap_groups/models/res_company_ldap.py
@@ -48,7 +48,7 @@ def _get_or_create_user(self, conf, login, ldap_entry):
             _logger.debug("deleting all groups from user %d", user_id)
             groups.append((5, False, False))
         for mapping in this.group_mapping_ids:
-            operator = getattr(op_obj, f'_{mapping.operator}')
+            operator = getattr(op_obj, f"_{mapping.operator}")
             _logger.debug("checking mapping %s", mapping)
             if operator(ldap_entry, mapping):
                 _logger.debug(