diff --git a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
index 9046ec0a87fc..8f04bf116a6c 100644
--- a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
+++ b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
@@ -6,6 +6,7 @@ stdenv.mkDerivation rec {
   src = fetchurl {
     url = "http://www.katjaas.nl/helmholtz/helmholtz~.zip";
     name = "helmholtz.zip";
+    curlOpts = "--user-agent ''";
     sha256 = "0h1fj7lmvq9j6rmw33rb8k0byxb898bi2xhcwkqalb84avhywgvs";
   };