diff --git a/lib/ansible/module_utils/openstack.py b/lib/ansible/module_utils/openstack.py
index 40694491443..934d51a271c 100644
--- a/lib/ansible/module_utils/openstack.py
+++ b/lib/ansible/module_utils/openstack.py
@@ -74,13 +74,13 @@ def openstack_full_argument_spec(**kwargs):
     spec = dict(
         cloud=dict(default=None),
         auth_type=dict(default=None),
-        auth=dict(default=None),
+        auth=dict(default=None, no_log=True),
         region_name=dict(default=None),
         availability_zone=dict(default=None),
         verify=dict(default=True, aliases=['validate_certs']),
         cacert=dict(default=None),
         cert=dict(default=None),
-        key=dict(default=None),
+        key=dict(default=None, no_log=True),
         wait=dict(default=True, type='bool'),
         timeout=dict(default=180, type='int'),
         api_timeout=dict(default=None, type='int'),