diff --git a/nixos/modules/services/logging/journalwatch.nix b/nixos/modules/services/logging/journalwatch.nix
index 19ec7f76af8c..7ec2144230ed 100644
--- a/nixos/modules/services/logging/journalwatch.nix
+++ b/nixos/modules/services/logging/journalwatch.nix
@@ -72,7 +72,7 @@ in
       package = lib.mkPackageOption pkgs "journalwatch" { };
 
       priority = lib.mkOption {
-        type = lib.types.int;
+        type = lib.types.ints.between 0 7;
         default = 6;
         description = ''
           Lowest priority of message to be considered.