diff --git a/nixos/modules/services/logging/logcheck.nix b/nixos/modules/services/logging/logcheck.nix
index a8a214b2155..27ed5374f56 100644
--- a/nixos/modules/services/logging/logcheck.nix
+++ b/nixos/modules/services/logging/logcheck.nix
@@ -55,9 +55,9 @@ let
 
   levelOption = mkOption {
     default = "server";
-    type = types.str;
+    type = types.enum [ "workstation" "server" "paranoid" ];
     description = ''
-      Set the logcheck level. Either "workstation", "server", or "paranoid".
+      Set the logcheck level.
     '';
   };