diff --git a/extra-nixos.nix b/extra-nixos.nix
index 6bc6f6b..5beb490 100644
--- a/extra-nixos.nix
+++ b/extra-nixos.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, options, ... }:
 {
 
 # Set kernel to latest
@@ -27,5 +27,7 @@ networking.extraHosts =
   ''
     10.1.40.11 netbox-100.intern.menzel-it.net
   '';
-#  
+#### NTP server ####
+networking.timeServers = [ "time.home" ] ++ options.networking.timeServers.default; 
+
 }