diff --git a/pkgs/by-name/ad/adns/package.nix b/pkgs/by-name/ad/adns/package.nix
index 1e9bac183dab..d57c8768ceed 100644
--- a/pkgs/by-name/ad/adns/package.nix
+++ b/pkgs/by-name/ad/adns/package.nix
@@ -22,9 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   configureFlags = lib.optional stdenv.hostPlatform.isStatic "--disable-dynamic";
 
-  # Autogenerated headers miss interdependencies in Makefile, fail parallel build:
-  #  https://debbugs.gnu.org/cgi/bugreport.cgi?bug=51329
-  enableParallelBuilding = false;
+  enableParallelBuilding = true;
 
   # https://www.mail-archive.com/nix-dev@cs.uu.nl/msg01347.html for details.
   doCheck = false;