diff --git a/modules/clan/gw-router/default.nix b/modules/clan/gw-router/default.nix
index 18e4108..559d31b 100644
--- a/modules/clan/gw-router/default.nix
+++ b/modules/clan/gw-router/default.nix
@@ -141,6 +141,8 @@
               the VLAN's PVID. Use for an always-available on-site mgmt port.
             '';
           };
+
+          secondaryUpLink = lib.mkOption { };
         };
       };