diff --git a/pkgs/tools/filesystems/fatsort/default.nix b/pkgs/tools/filesystems/fatsort/default.nix
index 7c9edf2f84d..6db496242d2 100644
--- a/pkgs/tools/filesystems/fatsort/default.nix
+++ b/pkgs/tools/filesystems/fatsort/default.nix
@@ -1,12 +1,12 @@
 {lib, stdenv, fetchurl, help2man}:
 
 stdenv.mkDerivation rec {
-  version = "1.6.3.622";
+  version = "1.6.4.625";
   pname = "fatsort";
 
   src = fetchurl {
     url = "mirror://sourceforge/fatsort/${pname}-${version}.tar.xz";
-    sha256 = "1z2nabm38lg56h05yx3jjsndbqxk1zbjcisrczzamypn13m98728";
+    sha256 = "sha256-mm+JoGQLt4LYL/I6eAyfCuw9++RoLAqO2hV+CBBkLq0=";
   };
 
   patches = [ ./fatsort-Makefiles.patch ];