diff --git a/roles/standalone/templates/standalone_config.yaml.j2 b/roles/standalone/templates/standalone_config.yaml.j2
index 375697166..9d95204af 100644
--- a/roles/standalone/templates/standalone_config.yaml.j2
+++ b/roles/standalone/templates/standalone_config.yaml.j2
@@ -24,6 +24,9 @@ parameter_defaults:
     {{ standalone_network }}.0/{{ standalone_network_prefix }}:
     - {{ standalone_network }}.0/{{ standalone_network_prefix }}
   NeutronPublicInterface: {{ standalone_interface }}
+{% if standalone_neutron_bridge_mappings is defined and standalone_neutron_bridge_mappings %}
+  NeutronBridgeMappings: {{ standalone_neutron_bridge_mappings }}
+{% endif %}
   StandaloneCtlplaneLocalSubnet: ctlplane-subnet
   StandaloneCtlplaneSubnets:
     ctlplane-subnet: