diff --git a/pkgs/development/ocaml-modules/rresult/default.nix b/pkgs/development/ocaml-modules/rresult/default.nix
new file mode 100644
index 000000000000..f9951b56da2d
--- /dev/null
+++ b/pkgs/development/ocaml-modules/rresult/default.nix
@@ -0,0 +1,24 @@
+{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, opam, topkg }:
+
+stdenv.mkDerivation rec {
+	name = "ocaml${ocaml.version}-rresult-${version}";
+	version = "0.5.0";
+	src = fetchurl {
+		url = "http://erratique.ch/software/rresult/releases/rresult-${version}.tbz";
+		sha256 = "1xxycxhdhaq8p9vhwi93s2mlxjwgm44fcxybx5vghzgbankz9yhm";
+	};
+
+	unpackCmd = "tar xjf $src";
+
+	buildInputs = [ ocaml findlib ocamlbuild topkg opam ];
+
+	inherit (topkg) buildPhase installPhase;
+
+	meta = {
+		license = stdenv.lib.licenses.isc;
+		homepage = http://erratique.ch/software/rresult;
+		description = "Result value combinators for OCaml";
+		maintainers = [ stdenv.lib.maintainers.vbgl ];
+		inherit (ocaml.meta) platforms;
+	};
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 2a59dbd3293f..aeef0a2859bb 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -494,6 +494,8 @@ let
 
     re = callPackage ../development/ocaml-modules/re { };
 
+    rresult = callPackage ../development/ocaml-modules/rresult { };
+
     safepass = callPackage ../development/ocaml-modules/safepass { };
 
     sedlex = callPackage ../development/ocaml-modules/sedlex { };