diff --git a/pkgs/development/python-modules/pycups/default.nix b/pkgs/development/python-modules/pycups/default.nix
index c9dce559701..28dff352e38 100644
--- a/pkgs/development/python-modules/pycups/default.nix
+++ b/pkgs/development/python-modules/pycups/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchurl, cups }:
+{ stdenv, lib, buildPythonPackage, fetchurl, cups, libiconv }:
 
 buildPythonPackage rec {
   pname = "pycups";
@@ -9,7 +9,7 @@ buildPythonPackage rec {
     sha256 = "c381be011889ca6f728598578c89c8ac9f7ab1e95b614474df9f2fa831ae5335";
   };
 
-  buildInputs = [ cups ];
+  buildInputs = [ cups ] ++ lib.optional stdenv.isDarwin libiconv;
 
   # Wants to connect to CUPS
   doCheck = false;