creating network with transparent vlan fails

creating a new provider network with the following command will fail:

openstack network create --share --provider-physical-network provider --transparent-vlan --provider-network-type vlan --provider-segment 900 vlan-internal2

the return is a python trace with the message: "CommandError: Error while executing command: Internal Server Error"

looking at the output bit more closely it does not even send the --transparent-vlan option:

Using https://XXXXXXX:9696/v2.0 as public network endpoint
REQ: curl -g -i --cacert "/etc/ssl/certs/ca-certs.pem" -X POST https://XXXXXXX:9696/v2.0/networks -H "User-Agent: openstacksdk/0.9.13 keystoneauth1/2.18.0 python-requests/2.12.4 CPython/2.7.12" -H "Content-Type: application/json" -H "X-Auth-Token: {SHA1}XXXXXX" -d '{"network": {"name": "vlan-internal2", "provider:physical_network": "provider", "admin_state_up": true, "provider:network_type": "vlan", "shared": true, "provider:segmentation_id": "900"}}'

so for whatever reason it does not even send the transparent vlan flag.