diff --git a/contrail/environment/modules/contrail/manifests/profile/openstack/heat.pp b/contrail/environment/modules/contrail/manifests/profile/openstack/heat.pp
index f24e1f63..9f215388 100644
--- a/contrail/environment/modules/contrail/manifests/profile/openstack/heat.pp
+++ b/contrail/environment/modules/contrail/manifests/profile/openstack/heat.pp
@@ -69,7 +69,7 @@
   $contrail_api_server = $::contrail::params::config_ip_to_use
 
   heat_config {
-      'DEFAULT/plugin_dirs': value => '${::python_dist}/vnc_api/gen/heat/resources,${::python_dist}/contrail_heat/resources';
+      'DEFAULT/plugin_dirs': value => "${::python_dist}/vnc_api/gen/heat/resources,${::python_dist}/contrail_heat/resources";
       'clients_contrail/user': value => 'admin';
       'clients_contrail/password': value => 'contrail123';
       'clients_contrail/tenent': value => 'admin';