diff --git a/pkgs/development/ocaml-modules/mlx/default.nix b/pkgs/development/ocaml-modules/mlx/default.nix
index 436fc41ab5da..830938e70330 100644
--- a/pkgs/development/ocaml-modules/mlx/default.nix
+++ b/pkgs/development/ocaml-modules/mlx/default.nix
@@ -1,6 +1,7 @@
 {
   lib,
   fetchFromGitHub,
+  fetchpatch,
   buildDunePackage,
   ppxlib,
   menhir,
@@ -19,6 +20,13 @@ buildDunePackage rec {
     hash = "sha256-3hPtyBKD2dp4UJBykOudW6KR2KXPnBuDnuJ1UNLpAp0=";
   };
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/ocaml-mlx/mlx/commit/01771e2a8b45f4f70cfd93533af2af9ed4a28a7e.patch";
+      hash = "sha256-czA2sIORmunIeaHn7kpcuv0y97uJhe6aUEMj/QHEag4=";
+    })
+  ];
+
   buildInputs = [
     ppxlib
     menhir