diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index b7c09d2e4bf..5c8cce5066a 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -764,7 +764,7 @@ in
         { wantedBy = [ "timers.target" ];
           timerConfig.OnCalendar = service.startAt;
         })
-        (filterAttrs (name: service: service.startAt != "") cfg.services);
+        (filterAttrs (name: service: service.enable && service.startAt != "") cfg.services);
 
     # Generate timer units for all services that have a ‘startAt’ value.
     systemd.user.timers =