diff --git a/cloud/openstack/os_security_group.py b/cloud/openstack/os_security_group.py
index e42b7f938f5..fd839755144 100644
--- a/cloud/openstack/os_security_group.py
+++ b/cloud/openstack/os_security_group.py
@@ -91,7 +91,7 @@ def _system_state_change(module, secgroup):
 def main():
     argument_spec = openstack_full_argument_spec(
         name=dict(required=True),
-        description=dict(default=None),
+        description=dict(default=''),
         state=dict(default='present', choices=['absent', 'present']),
     )