diff --git a/lib/ansible/module_utils/openstack.py b/lib/ansible/module_utils/openstack.py
index afbd8857eb..9cfc6cba0c 100644
--- a/lib/ansible/module_utils/openstack.py
+++ b/lib/ansible/module_utils/openstack.py
@@ -90,6 +90,9 @@ def openstack_full_argument_spec(**kwargs):
         api_timeout=dict(default=None, type='int'),
         endpoint_type=dict(
             default='public', choices=['public', 'internal', 'admin']
+        ),
+        identity_api_version=dict(
+            default=None, choices=['2.0', '3']
         )
     )
     spec.update(kwargs)
diff --git a/lib/ansible/utils/module_docs_fragments/openstack.py b/lib/ansible/utils/module_docs_fragments/openstack.py
index 88aaad1799..ade8aa7135 100644
--- a/lib/ansible/utils/module_docs_fragments/openstack.py
+++ b/lib/ansible/utils/module_docs_fragments/openstack.py
@@ -93,6 +93,12 @@ options:
     choices: [public, internal, admin]
     required: false
     default: public
+  identity_api_version:
+    description:
+        - The identity API version
+    choices: [2.0, 3]
+    required: false
+    default: None
 requirements:
   - python >= 2.7
   - shade