diff --git a/backup.nix b/backup.nix
index 81291db..4ef053b 100644
--- a/backup.nix
+++ b/backup.nix
@@ -67,6 +67,9 @@ in
         RandomizedDelaySec = cfg.randomized-delay;
       };
     };
+    systemd.units."backup-helper@etc-machine\x2did.timer" = {
+      enable = true;
+    };
   };
 }