diff --git a/nixos/modules/services/misc/tzupdate.nix b/nixos/modules/services/misc/tzupdate.nix
index 454b47620e11..044b1dc44777 100644
--- a/nixos/modules/services/misc/tzupdate.nix
+++ b/nixos/modules/services/misc/tzupdate.nix
@@ -68,7 +68,6 @@ in
 
     systemd.timers.tzupdate = {
       enable = cfg.timer.enable;
-      interval = cfg.timer.interval;
       timerConfig = {
         OnStartupSec = "30s";
         OnCalendar = cfg.timer.interval;