diff --git a/pkgs/tools/networking/chrony/default.nix b/pkgs/tools/networking/chrony/default.nix
index 24968c64a093..1fc5e84fddef 100644
--- a/pkgs/tools/networking/chrony/default.nix
+++ b/pkgs/tools/networking/chrony/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   hardeningEnable = [ "pie" ];
 
-  configureFlags = [ "--chronyvardir=$(out)/var/lib/chrony" ]
+  configureFlags = [ "--chronyvardir=$(out)/var/lib/chrony" "--enable-ntp-signd" ]
     ++ lib.optional stdenv.isLinux "--enable-scfilter";
 
   meta = with lib; {