diff --git a/network/service_net_map.j2.yaml b/network/service_net_map.j2.yaml
index 0edfc17c7c..579dce5a33 100644
--- a/network/service_net_map.j2.yaml
+++ b/network/service_net_map.j2.yaml
@@ -64,6 +64,8 @@ resources:
                 {{network.name_lower}}: {get_param: {{network.name}}NetName}
 {%- endfor %}
               keys: {get_param: ServiceNetMapDeprecatedMapping}
+        # (mschuppert) this is to keep NovaVncProxyNetwork and NovaLibvirtNetwork
+        # in sync to not break VNC console
         - NovaVncProxyNetwork: { get_param: [ServiceNetMap, NovaLibvirtNetwork] }
 
 outputs: