diff --git a/pkgs/tools/networking/pdnsd/default.nix b/pkgs/tools/networking/pdnsd/default.nix
index 40d57cd65b6..b1e7e92e815 100644
--- a/pkgs/tools/networking/pdnsd/default.nix
+++ b/pkgs/tools/networking/pdnsd/default.nix
@@ -12,6 +12,8 @@ stdenv.mkDerivation rec {
     sed -i 's/.*(cachedir).*/:/' Makefile.in
   '';
 
+  configureFlags = [ "--enable-ipv6" ];
+
   meta = { 
     description = "Permanent DNS caching";
     homepage = http://www.phys.uu.nl/~rombouts/pdnsd.html;