diff --git a/lib/fog/openstack/compute.rb b/lib/fog/openstack/compute.rb
index 38bc5a2e..d72856e4 100644
--- a/lib/fog/openstack/compute.rb
+++ b/lib/fog/openstack/compute.rb
@@ -14,7 +14,7 @@ class Compute < Fog::Service
                  :openstack_project_name, :openstack_project_id,
                  :openstack_project_domain, :openstack_user_domain, :openstack_domain_name,
                  :openstack_project_domain_id, :openstack_user_domain_id, :openstack_domain_id,
-                 :openstack_identity_api_version
+                 :openstack_identity_api_version, :openstack_user_domain_name
 
       ## MODELS
       #