diff --git a/pkgs/development/libraries/libpng/default.nix b/pkgs/development/libraries/libpng/default.nix
index bfd0a6b98b1..0a1e4c0f35d 100644
--- a/pkgs/development/libraries/libpng/default.nix
+++ b/pkgs/development/libraries/libpng/default.nix
@@ -1,17 +1,19 @@
-{ stdenv, fetchurl, zlib }:
+{ stdenv, fetchurl, zlib, xz }:
 
 assert zlib != null;
 
 stdenv.mkDerivation rec {
-  name = "libpng-1.2.44";
+  name = "libpng-1.2.46";
   
   src = fetchurl {
     url = "mirror://sourceforge/libpng/${name}.tar.gz";
-    md5 = "89b62f8daaeeab1342e307d6d1411ff1";
+    sha256 = "0rcx4v4khdkrvz7b02fmx7lab2pk1lal4dhx9widv36b7g2xvwzn";
   };
   
   propagatedBuildInputs = [ zlib ];
 
+  buildNativeInputs = [ xz ];
+
   passthru = { inherit zlib; };
   
   meta = {