diff --git a/pkgs/development/ocaml-modules/httpcats/default.nix b/pkgs/development/ocaml-modules/httpcats/default.nix
index 74b1578935d4..6c5b39077b17 100644
--- a/pkgs/development/ocaml-modules/httpcats/default.nix
+++ b/pkgs/development/ocaml-modules/httpcats/default.nix
@@ -1,4 +1,5 @@
 {
+  fetchpatch,
   fetchFromGitHub,
   buildDunePackage,
   lib,
@@ -28,6 +29,13 @@ buildDunePackage (finalAttrs: {
     hash = "sha256-I7u/n49WOnpc0EaagsjC4Ts/kz0Xj6YHZv6+QZKLrC4=";
   };
 
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/robur-coop/httpcats/commit/d8787555d4831e0488780d42bd2c65de662d1d38.patch";
+      hash = "sha256-Mqam6Sxd2kkkHDm459u9uerifuHbvZUVy2khQffvvCE=";
+    })
+  ];
+
   propagatedBuildInputs = [
     h2
     h1