diff --git a/nixos/modules/services/networking/ntp/chrony.nix b/nixos/modules/services/networking/ntp/chrony.nix
index 4736069fd37..08e58873aca 100644
--- a/nixos/modules/services/networking/ntp/chrony.nix
+++ b/nixos/modules/services/networking/ntp/chrony.nix
@@ -9,7 +9,7 @@ let
   keyFile = "${stateDir}/chrony.keys";
 
   configFile = pkgs.writeText "chrony.conf" ''
-    ${concatMapStringsSep "\n" (server: "server " + server) cfg.servers}
+    ${concatMapStringsSep "\n" (server: "server " + server + " iburst") cfg.servers}
 
     ${optionalString
       (cfg.initstepslew.enabled && (cfg.servers != []))