diff --git a/backup.nix b/backup.nix
index 4ef053b..950f5c0 100644
--- a/backup.nix
+++ b/backup.nix
@@ -69,6 +69,7 @@ in
     };
     systemd.units."backup-helper@etc-machine\x2did.timer" = {
       enable = true;
+      wantedBy = [ "timers.target" ];
     };
   };
 }