diff --git a/examples/rotuer.nix b/examples/rotuer.nix
index 3133c884..046994a9 100644
--- a/examples/rotuer.nix
+++ b/examples/rotuer.nix
@@ -295,6 +295,15 @@ in rec {
       dependencies = [ services.wan ];
     };
 
+  services.set-wan-address =
+    oneshot {
+      name = "set-wan-address";
+      # FIXME nasty bit of hardcoding - should get this from  dhcp6c
+      up = "ip address add 2001:8b0:1111:1111:0:ffff:51bb:4cf2/128 dev ppp0";
+      down = "ip address del 2001:8b0:1111:1111:0:ffff:51bb:4cf2/128 dev ppp0";
+      dependencies = [ services.dhcp6 ];
+    };
+
   services.acquire-lan-prefix =
     let script = pkgs.callPackage ./acquire-delegated-prefix.nix {  };
     in longrun {
@@ -322,6 +331,7 @@ in rec {
       config.services.hostname
       dhcp6
       acquire-lan-prefix
+      set-wan-address
     ];
   };
   defaultProfile.packages = with pkgs; [