diff --git a/nix/nixos-module/network.nix b/nix/nixos-module/network.nix
index 943661f..fd41187 100644
--- a/nix/nixos-module/network.nix
+++ b/nix/nixos-module/network.nix
@@ -32,8 +32,10 @@ in
         in rec {
           matchConfig.Name = ifName;
 
-          networkConfig.IPForward =
-            config.site.hosts.${hostName}.isRouter;
+          networkConfig = {
+            IPForward = config.site.hosts.${hostName}.isRouter;
+            IPv6AcceptRA = lib.mkDefault false;
+          };
 
           addresses =
             let