diff --git a/hosts/valefar/default.nix b/hosts/valefar/default.nix
index b60a203..6a3e24a 100644
--- a/hosts/valefar/default.nix
+++ b/hosts/valefar/default.nix
@@ -164,10 +164,7 @@
       "10-lan-bridge" = {
         matchConfig.Name = "vmbr0";
         networkConfig = {
-          Address = [
-            "10.0.0.30/24"
-            "2601:5c2:8400:26c0::30/64"
-          ];
+          Address = [ "10.0.0.30/24" ];
           Gateway = "10.0.0.1";
           DNS = [
             "10.0.0.210"
@@ -176,6 +173,9 @@
           ];
           IPv6AcceptRA = true;
         };
+        # ::30 under whatever /64 the router advertises; a hardcoded prefix goes
+        # stale when the ISP renumbers (26c0 -> 91d1 by 2026-10-07)
+        ipv6AcceptRAConfig.Token = "static:::30";
         routes = [
           {
             Destination = "0.0.0.0/0";