diff --git a/pkgs/tools/backup/httrack/default.nix b/pkgs/tools/backup/httrack/default.nix
index 573c4b58d60d..8860fbc5dbcd 100644
--- a/pkgs/tools/backup/httrack/default.nix
+++ b/pkgs/tools/backup/httrack/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, zlib, openssl }:
+{ stdenv, fetchurl, zlib, openssl, libiconv }:
 
 stdenv.mkDerivation rec {
   version = "3.48.21";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "10p4gf8y9h7mxkqlbs3hqgvmvbgvcbax8jp1whbw4yidwahn06w7";
   };
 
-  buildInputs = [ zlib openssl ];
+  buildInputs = [ zlib openssl ] ++ stdenv.lib.optional stdenv.isDarwin libiconv;
 
   meta = {
     homepage = "http://www.httrack.com";