diff --git a/modules/virtualisation/xen-domU.nix b/modules/virtualisation/xen-domU.nix
index f4cbaf24c2b..a83e5dc612e 100644
--- a/modules/virtualisation/xen-domU.nix
+++ b/modules/virtualisation/xen-domU.nix
@@ -20,4 +20,7 @@
   # Start a mingetty on the Xen console (so that you can login using
   # "xm console" in Dom0). 
   services.mingetty.ttys = [ "hvc0" "tty1" "tty2" ];
+
+  # Don't run ntpd, since we should get the correct time from Dom0.
+  services.ntp.enable = false;
 }