diff --git a/hooks/keystone_utils.py b/hooks/keystone_utils.py
index e3530534..359a4d54 100644
--- a/hooks/keystone_utils.py
+++ b/hooks/keystone_utils.py
@@ -2068,6 +2068,8 @@ def add_credentials_to_keystone(relation_id=None, remote_unit=None):
         "api_version": get_api_version(),
         "region": config('region')
     }
+    if domain:
+        relation_data['domain'] = domain
     # Get and pass CA bundle settings
     relation_data.update(get_ssl_ca_settings())
 
diff --git a/unit_tests/test_keystone_utils.py b/unit_tests/test_keystone_utils.py
index 29f9e6b9..01f4238e 100644
--- a/unit_tests/test_keystone_utils.py
+++ b/unit_tests/test_keystone_utils.py
@@ -1134,6 +1134,7 @@ class TestKeystoneUtils(CharmTestCase):
                          'credentials_project': 'services',
                          'credentials_project_id': 'abcdef0123456789',
                          'region': 'RegionOne',
+                         'domain': 'Non-Default',
                          'api_version': 3}
 
         utils.add_credentials_to_keystone(