diff --git a/modules/openstack_project/manifests/slave_template.pp b/modules/openstack_project/manifests/slave_template.pp
index 21ea1f1e33..e0023977e6 100644
--- a/modules/openstack_project/manifests/slave_template.pp
+++ b/modules/openstack_project/manifests/slave_template.pp
@@ -7,7 +7,8 @@ class openstack_project::slave_template (
   class { 'openstack_project::template':
     # Port 8000 from the devstack neutron public net to allow
     # nova servers to reach heat-api-cfn
-    rules4                    => ['-p tcp --dport 8000 -s 172.24.4.0/24 -j ACCEPT'],
+    iptables_rules4           =>
+      ['-p tcp --dport 8000 -s 172.24.4.0/24 -j ACCEPT'],
     iptables_public_tcp_ports => [],
     install_users             => $install_users,
   }