diff --git a/pkgs/development/ocaml-modules/secp256k1/default.nix b/pkgs/development/ocaml-modules/secp256k1/default.nix
index 5a97578db5dd..d27d260a3723 100644
--- a/pkgs/development/ocaml-modules/secp256k1/default.nix
+++ b/pkgs/development/ocaml-modules/secp256k1/default.nix
@@ -1,6 +1,7 @@
 {
   lib,
   fetchFromGitHub,
+  fetchpatch,
   buildDunePackage,
   base,
   stdio,
@@ -21,6 +22,11 @@ buildDunePackage rec {
     hash = "sha256-22+dZb3MC1W5Qvsz3+IHV1/XiGCRmJHTH+6IW2QX2hU=";
   };
 
+  patches = fetchpatch {
+    url = "https://github.com/dakk/secp256k1-ml/commit/9bde90a401746dcecdab68a2fdb95659d16a3022.patch";
+    hash = "sha256-QndtZJtPKPjuv84jDmXc9Q/xGLb/mNUGL4AvRecSFlQ=";
+  };
+
   buildInputs = [
     base
     stdio