diff --git a/pkgs/tools/misc/parallel/default.nix b/pkgs/tools/misc/parallel/default.nix
index ca347cfe8425..7e8a8312f509 100644
--- a/pkgs/tools/misc/parallel/default.nix
+++ b/pkgs/tools/misc/parallel/default.nix
@@ -1,11 +1,11 @@
 { fetchurl, stdenv, perl, makeWrapper, procps }:
 
 stdenv.mkDerivation rec {
-  name = "parallel-20151122";
+  name = "parallel-20151222";
 
   src = fetchurl {
     url = "mirror://gnu/parallel/${name}.tar.bz2";
-    sha256 = "0phn9dlkqlq3cq468ypxbbn78bsjcin743pyvf8ip4qg6jz662jm";
+    sha256 = "03czpnsj77xxzqxzzr1b39ym9acn94hknzbilbh28v5q1wk7r4mf";
   };
 
   nativeBuildInputs = [ makeWrapper ];