diff --git a/pkgs/development/libraries/wcslib/default.nix b/pkgs/development/libraries/wcslib/default.nix
index ba2d1ab11fc..12741379aaa 100644
--- a/pkgs/development/libraries/wcslib/default.nix
+++ b/pkgs/development/libraries/wcslib/default.nix
@@ -1,16 +1,18 @@
 { fetchurl,  stdenv, flex }:
 
 stdenv.mkDerivation rec {
-  version = "5.12";
+  version = "5.13";
   name = "wcslib-${version}";
 
   buildInputs = [ flex ];
 
   src = fetchurl {
     url = "ftp://ftp.atnf.csiro.au/pub/software/wcslib/${name}.tar.bz2";
-    sha256 ="1r4dz5514pba2d5cc2ydpnqm85xsvy65hlvzdqayl6sl40liizsh";
+    sha256 ="1rxlp7p1b84r9fnk7m9p2ivg2cajfj88afyccrg64zlrqn5kx66n";
   };
 
+  enableParallelBuilding = true;
+
   meta = {
     description = "World Coordinate System Library for Astronomy";
     homepage = http://www.atnf.csiro.au/people/mcalabre/WCS/;