diff --git a/devstack/settings b/devstack/settings
index 65f60bbaa..9e1858ed3 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -12,7 +12,7 @@ KURYR_DOCKER_ENGINE_SOCKET_FILE=${KURYR_DOCKER_ENGINE_SOCKET_FILE:-/var/run/dock
 KURYR_CONFIGURE_NEUTRON_DEFAULTS=${KURYR_CONFIGURE_NEUTRON_DEFAULTS:-True}
 KURYR_NEUTRON_DEFAULT_PROJECT=demo
 KURYR_NEUTRON_DEFAULT_POD_SUBNET=${PRIVATE_SUBNET_NAME}
-KURYR_NEUTRON_DEFAULT_SERVICE_SUBNET=k8s-service-subnet
+KURYR_NEUTRON_DEFAULT_SERVICE_SUBNET=${KURYR_NEUTRON_DEFAULT_SERVICE_SUBNET:-k8s-service-subnet}
 
 # Etcd
 ETCD_PORT=${ETCD_PORT:-2379}