diff --git a/pkgs/development/ocaml-modules/httpun/types.nix b/pkgs/development/ocaml-modules/httpun/types.nix
new file mode 100644
index 0000000000000..f69535129a31c
--- /dev/null
+++ b/pkgs/development/ocaml-modules/httpun/types.nix
@@ -0,0 +1,24 @@
+{ lib
+, buildDunePackage
+, fetchurl
+, faraday
+}:
+
+buildDunePackage rec {
+  pname = "httpun-types";
+  version = "0.2.0";
+
+  src = fetchurl {
+    url = "https://github.com/anmonteiro/httpun/releases/download/${version}/httpun-${version}.tbz";
+    hash = "sha256-os4n70yFro4cEAjR49Xok9ayEbk0WGod0pQvfbaHvSw=";
+  };
+
+  propagatedBuildInputs = [ faraday ];
+
+  meta = {
+    description = "Common HTTP/1.x types";
+    homepage = "https://github.com/anmonteiro/httpun";
+    license = lib.licenses.bsd3;
+    maintainers = [ lib.maintainers.vbgl ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 51163610fe951..6cf16add62303 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -689,6 +689,8 @@ let
 
     httpaf-lwt-unix = callPackage ../development/ocaml-modules/httpaf/lwt-unix.nix { };
 
+    httpun-types = callPackage ../development/ocaml-modules/httpun/types.nix { };
+
     hxd = callPackage ../development/ocaml-modules/hxd { };
 
     ### I ###