diff --git a/nix/wgautomesh.nix b/nix/wgautomesh.nix
index 5a1480c..c64c4af 100644
--- a/nix/wgautomesh.nix
+++ b/nix/wgautomesh.nix
@@ -15,7 +15,7 @@ in
     options.services.wgautomesh = {
       enable = mkEnableOption "wgautomesh";
       logLevel = mkOption {
-        type = types.str;
+        type = types.enum [ "trace" "debug" "info" "warn" "error" ];
         default = "info";
         description = "wgautomesh log level (trace/debug/info/warn/error)";
       };