diff --git a/nixos/modules/services/networking/zerobin.nix b/nixos/modules/services/networking/zerobin.nix
index 49bcc9e830d3..96cf4cc7148d 100644
--- a/nixos/modules/services/networking/zerobin.nix
+++ b/nixos/modules/services/networking/zerobin.nix
@@ -44,7 +44,7 @@ in
       };
 
       listenPort = mkOption {
-        type = types.int;
+        type = types.port;
         default = 8000;
         example = 1357;
         description = ''