diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 8930fef..067306a 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -111,6 +111,8 @@ in
   };
   boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = "1";
   boot.kernel.sysctl."net.ipv6.conf.default.forwarding" = "1";
+  boot.kernel.sysctl."net.ipv6.conf.all.accept_dad" = "0";
+  boot.kernel.sysctl."net.ipv6.conf.default.accept_dad" = "0";
 
   services.unbound = {
     enable = true;