diff --git a/modules/restic/default.nix b/modules/restic/default.nix
index 1578ca1..3213d2d 100644
--- a/modules/restic/default.nix
+++ b/modules/restic/default.nix
@@ -32,7 +32,7 @@
         "--keep-last 3"
       ];
       timerConfig = {
-        onCalendar = "daily";
+        OnCalendar = "daily";
         Persistent = true;
         RandomizedDelaySec = "5h";
       };