diff --git a/nixos/modules/services/networking/chrony.nix b/nixos/modules/services/networking/chrony.nix
index d1684dd9f05d..58b30269ca7a 100644
--- a/nixos/modules/services/networking/chrony.nix
+++ b/nixos/modules/services/networking/chrony.nix
@@ -48,9 +48,10 @@ in
 
       servers = mkOption {
         default = [
-          "0.pool.ntp.org"
-          "1.pool.ntp.org"
-          "2.pool.ntp.org"
+          "0.nixos.pool.ntp.org"
+          "1.nixos.pool.ntp.org"
+          "2.nixos.pool.ntp.org"
+          "3.nixos.pool.ntp.org"
         ];
         description = ''
           The set of NTP servers from which to synchronise.
diff --git a/nixos/modules/services/networking/ntpd.nix b/nixos/modules/services/networking/ntpd.nix
index 2f638904406b..527882aad288 100644
--- a/nixos/modules/services/networking/ntpd.nix
+++ b/nixos/modules/services/networking/ntpd.nix
@@ -45,9 +45,10 @@ in
 
       servers = mkOption {
         default = [
-          "0.pool.ntp.org"
-          "1.pool.ntp.org"
-          "2.pool.ntp.org"
+          "0.nixos.pool.ntp.org"
+          "1.nixos.pool.ntp.org"
+          "2.nixos.pool.ntp.org"
+          "3.nixos.pool.ntp.org"
         ];
         description = ''
           The set of NTP servers from which to synchronise.