diff --git a/pkgs/development/compilers/mkcl/default.nix b/pkgs/development/compilers/mkcl/default.nix
index 3656f1e0dd82..181c75c81b01 100644
--- a/pkgs/development/compilers/mkcl/default.nix
+++ b/pkgs/development/compilers/mkcl/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, makeWrapper, gmp, gcc }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, makeWrapper, gmp, gcc }:
 
 with lib; stdenv.mkDerivation rec {
   pname = "mkcl";
@@ -11,6 +11,15 @@ with lib; stdenv.mkDerivation rec {
     sha256 = "0i2bfkda20lfypis6i4m7srfz6miyf66d8knp693d6sms73m2l26";
   };
 
+  patches = [
+    # "Array sys_siglist[] never was part of the public interface. Replace it with calls to psiginfo()."
+    (fetchpatch {
+      name = "sys_siglist.patch";
+      url = "https://github.com/jcbeaudoin/MKCL/commit/0777dd08254c88676f4f101117b10786b22111d6.patch";
+      sha256 = "1dnr1jzha77nrxs22mclrcqyqvxxn6q1sfn35qjs77fi3jcinjsc";
+    })
+  ];
+
   nativeBuildInputs = [ makeWrapper ];
 
   propagatedBuildInputs = [ gmp ];