diff --git a/pkgs/development/ocaml-modules/async_extra/default.nix b/pkgs/development/ocaml-modules/async_extra/default.nix
new file mode 100644
index 00000000000..2d1e1dea69c
--- /dev/null
+++ b/pkgs/development/ocaml-modules/async_extra/default.nix
@@ -0,0 +1,26 @@
+{stdenv, buildOcaml, fetchurl, async_kernel, async_unix,
+ bin_prot, core, custom_printf, fieldslib, herelib, pa_ounit,
+ pipebang, pa_test, sexplib}:
+
+buildOcaml rec {
+  name = "async_extra";
+  version = "112.24.00";
+
+  minimumSupportedOcamlVersion = "4.02";
+
+  src = fetchurl {
+    url = "https://github.com/janestreet/async_extra/archive/${version}.tar.gz";
+    sha256 = "51f6f67a9ad56fe5dcf09faeeca6ec2fea53a7a975a72bc80504b90841212e28";
+  };
+
+  buildInputs = [ pa_test pa_ounit ];
+  propagatedBuildInputs = [ async_kernel async_unix core bin_prot custom_printf
+                            fieldslib herelib pipebang sexplib ];
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/janestreet/async_extra;
+    description = "Jane Street Capital's asynchronous execution library (extra)";
+    license = licenses.asl20;
+    maintainers = [ maintainers.ericbmerritt ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b6b2c063b68..16fe90e9cdb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4047,6 +4047,8 @@ let
 
     asn1-combinators = callPackage ../development/ocaml-modules/asn1-combinators { };
 
+    async_extra = callPackage ../development/ocaml-modules/async_extra { };
+
     async_kernel = callPackage ../development/ocaml-modules/async_kernel { };
 
     async_unix = callPackage ../development/ocaml-modules/async_unix { };