diff --git a/lib/ansible/modules/extras/cloud/openstack/os_keystone_domain.py b/lib/ansible/modules/extras/cloud/openstack/os_keystone_domain.py
index ef9e5eb9eba..bed2f0410ce 100644
--- a/lib/ansible/modules/extras/cloud/openstack/os_keystone_domain.py
+++ b/lib/ansible/modules/extras/cloud/openstack/os_keystone_domain.py
@@ -181,7 +181,7 @@ def main():
             module.exit_json(changed=changed)
 
     except shade.OpenStackCloudException as e:
-        module.fail_json(msg=e.message)
+        module.fail_json(msg=str(e))
 
 
 from ansible.module_utils.basic import *