diff --git a/pkgs/development/compilers/chicken/default.nix b/pkgs/development/compilers/chicken/default.nix
index 1a4e3377501..ff9f5d3f7c2 100644
--- a/pkgs/development/compilers/chicken/default.nix
+++ b/pkgs/development/compilers/chicken/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl }:
 
 let
-  version = "4.9.0";
+  version = "4.9.0.1";
   platform = with stdenv;
     if isDarwin then "macosx"
     else if isCygwin then "cygwin"
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "http://code.call-cc.org/releases/4.9.0/chicken-${version}.tar.gz";
-    sha256 = "08jaavr3lhs0z2q9k7b7w8l3fsxpms58zxg8nyk8674p54cbwaig";
+    sha256 = "0598mar1qswfd8hva9nqs88zjn02lzkqd8fzdd21dz1nki1prpq4";
   };
 
   buildFlags = "PLATFORM=${platform} PREFIX=$(out) VARDIR=$(out)/var/lib";