diff --git a/pkgs/development/ocaml-modules/cohttp/async.nix b/pkgs/development/ocaml-modules/cohttp/async.nix
new file mode 100644
index 000000000000..23e6f4f10a14
--- /dev/null
+++ b/pkgs/development/ocaml-modules/cohttp/async.nix
@@ -0,0 +1,21 @@
+{ stdenv, buildDunePackage, async, cohttp, conduit-async, uri, ppx_sexp_conv
+, logs, magic-mime }:
+
+if !stdenv.lib.versionAtLeast cohttp.version "0.99" then
+	cohttp
+else if !stdenv.lib.versionAtLeast async.version "0.13" then
+	throw "cohttp-async needs async-0.13 (hence OCaml >= 4.08)"
+else
+
+	buildDunePackage {
+		pname = "cohttp-async";
+		inherit (cohttp) version src;
+
+		buildInputs = [ ppx_sexp_conv ];
+
+		propagatedBuildInputs = [ async cohttp conduit-async logs magic-mime uri ];
+
+		meta = cohttp.meta // {
+			description = "CoHTTP implementation for the Async concurrency library";
+		};
+	}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index d9937829b93e..ba02c3bb5246 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -137,6 +137,8 @@ let
 
     cohttp = callPackage ../development/ocaml-modules/cohttp { };
 
+    cohttp-async = callPackage ../development/ocaml-modules/cohttp/async.nix { };
+
     cohttp-lwt = callPackage ../development/ocaml-modules/cohttp/lwt.nix { };
 
     cohttp-lwt-unix = callPackage ../development/ocaml-modules/cohttp/lwt-unix.nix { };