diff --git a/lib/ansible/modules/cloud/openstack/os_group_facts.py b/lib/ansible/modules/cloud/openstack/os_group_facts.py
index 2b3f017d8ef..1c9bb455f21 100644
--- a/lib/ansible/modules/cloud/openstack/os_group_facts.py
+++ b/lib/ansible/modules/cloud/openstack/os_group_facts.py
@@ -41,6 +41,7 @@ options:
    availability_zone:
      description:
        - Ignored. Present for backwards compatibility
+     type: str
 '''
 
 EXAMPLES = '''