diff --git a/pkgs/development/ocaml-modules/synchronizer/default.nix b/pkgs/development/ocaml-modules/synchronizer/default.nix
new file mode 100644
index 000000000000..8d827b2c0bd9
--- /dev/null
+++ b/pkgs/development/ocaml-modules/synchronizer/default.nix
@@ -0,0 +1,32 @@
+{
+  lib,
+  fetchFromGitHub,
+  buildDunePackage,
+  prelude,
+}:
+
+buildDunePackage rec {
+  pname = "synchronizer";
+  version = "0.1";
+
+  minimalOCamlVersion = "5.1";
+
+  src = fetchFromGitHub {
+    owner = "OCamlPro";
+    repo = "synchronizer";
+    tag = version;
+    hash = "sha256-VlKqORXTXafT88GXHIYkz+A1VkEL3jP9SMqDdMyEdrw=";
+  };
+
+  propagatedBuildInputs = [
+    prelude
+  ];
+
+  meta = {
+    homepage = "https://github.com/OCamlPro/synchronizer";
+    description = "Synchronizer to make datastructures thread-safe";
+    changelog = "https://raw.githubusercontent.com/OCamlPro/synchronizer/${src.rev}/CHANGES.md";
+    license = lib.licenses.agpl3Plus;
+    maintainers = with lib.maintainers; [ redianthus ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index f884a3d7ad7f..07345c1958b5 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1977,6 +1977,8 @@ let
 
         swhid_core = callPackage ../development/ocaml-modules/swhid_core { };
 
+        synchronizer = callPackage ../development/ocaml-modules/synchronizer { };
+
         syslog = callPackage ../development/ocaml-modules/syslog { };
 
         syslog-message = callPackage ../development/ocaml-modules/syslog-message { };