diff --git a/pkgs/development/tools/misc/cproto/default.nix b/pkgs/development/tools/misc/cproto/default.nix
index c8448f44153b..3692da13f91d 100644
--- a/pkgs/development/tools/misc/cproto/default.nix
+++ b/pkgs/development/tools/misc/cproto/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   pname = "cproto";
-  version = "4.7t";
+  version = "4.7u";
 
   src = fetchurl {
     urls = [
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
       # No version listings and apparently no versioned tarball over http(s).
       "ftp://ftp.invisible-island.net/cproto/cproto-${version}.tgz"
     ];
-    sha256 = "sha256-PM6CpxaHtp4KPiNIn+glunLmk+VZzPGTOVIIrA65b+U=";
+    sha256 = "sha256-ZOu7zF4FAa/ylvQx0G+ftwhjr+WwzmbDs0eQcpFPxR4=";
   };
 
   # patch made by Joe Khoobyar copied from gentoo bugs