diff --git a/pkgs/development/ocaml-modules/ocplib-endian/default.nix b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
new file mode 100644
index 00000000000..aede92fc0f0
--- /dev/null
+++ b/pkgs/development/ocaml-modules/ocplib-endian/default.nix
@@ -0,0 +1,24 @@
+{ stdenv, fetchzip, ocaml, findlib, cppo }:
+
+let version = "0.8"; in
+
+stdenv.mkDerivation {
+  name = "ocaml-ocplib-endian-${version}";
+
+  src = fetchzip {
+    url = "https://github.com/OCamlPro/ocplib-endian/archive/${version}.tar.gz";
+    sha256 = "12xjvzw245mj4s02dgi4k2sx5gam7wxi4mbxmz6k18zg64n48yjd";
+  };
+
+  buildInputs = [ ocaml findlib cppo ];
+
+  createFindlibDestdir = true;
+
+  meta = {
+    description = "Optimised functions to read and write int16/32/64";
+    homepage = https://github.com/OCamlPro/ocplib-endian;
+    license = stdenv.lib.licenses.lgpl21;
+    platforms = ocaml.meta.platforms;
+    maintainers = with stdenv.lib.maintainers; [ vbgl ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 654e8f9a396..19043385de3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3988,6 +3988,8 @@ let
 
     ocp-index = callPackage ../development/tools/ocaml/ocp-index { };
 
+    ocplib-endian = callPackage ../development/ocaml-modules/ocplib-endian { };
+
     ocsigen_server = callPackage ../development/ocaml-modules/ocsigen-server { };
 
     ojquery = callPackage ../development/ocaml-modules/ojquery { };