diff --git a/nixos/modules/services/networking/seafile.nix b/nixos/modules/services/networking/seafile.nix
index 356bcfe04419d..ca8d41492e3d4 100644
--- a/nixos/modules/services/networking/seafile.nix
+++ b/nixos/modules/services/networking/seafile.nix
@@ -535,7 +535,7 @@ in
 
     systemd.timers.seaf-gc = lib.mkIf cfg.gc.enable {
       timerConfig = {
-        randomizedDelaySec = cfg.gc.randomizedDelaySec;
+        RandomizedDelaySec = cfg.gc.randomizedDelaySec;
         Persistent = cfg.gc.persistent;
       };
     };