diff --git a/lib/ansible/modules/cloud/openstack/quantum_subnet.py b/lib/ansible/modules/cloud/openstack/quantum_subnet.py
index e38b2c94aa..19e079adf7 100644
--- a/lib/ansible/modules/cloud/openstack/quantum_subnet.py
+++ b/lib/ansible/modules/cloud/openstack/quantum_subnet.py
@@ -28,6 +28,7 @@ except ImportError:
 DOCUMENTATION = '''
 ---
 module: quantum_subnet
+deprecated: Deprecated in 2.0. Use os_subnet instead
 version_added: "1.2"
 short_description: Add/remove subnet from a network
 description: