diff --git a/hosts/nullbox/impermanence.nix b/hosts/nullbox/impermanence.nix
index 6e78893..898bae7 100644
--- a/hosts/nullbox/impermanence.nix
+++ b/hosts/nullbox/impermanence.nix
@@ -88,6 +88,7 @@ in {
           "/var/lib/NetworkManager"
           "/var/lib/power-profiles-daemon"
           "/var/lib/systemd/rfkill"
+          "/var/lib/systemd/timesync"
           { directory = "/var/lib/tailscale"; mode = "0700"; }
           "/var/lib/unbound"
           "/var/db/sudo/lectured"