diff --git a/pkgs/development/ocaml-modules/vector/default.nix b/pkgs/development/ocaml-modules/vector/default.nix
new file mode 100644
index 00000000000..c5f4336bb83
--- /dev/null
+++ b/pkgs/development/ocaml-modules/vector/default.nix
@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, fetchurl }:
+
+buildDunePackage rec {
+  pname = "vector";
+  version = "1.0.0";
+
+  useDune2 = true;
+
+  src = fetchurl {
+    url = "https://github.com/backtracking/vector/releases/download/${version}/vector-${version}.tbz";
+    sha256 = "sha256:0hb6prpada4c5z07sxf5ayj5xbahsnwall15vaqdwdyfjgbd24pj";
+  };
+
+  doCheck = true;
+
+  meta = {
+    description = "Resizable arrays for OCaml";
+    license = lib.licenses.lgpl2Only;
+    homepage = "https://github.com/backtracking/vector";
+    maintainers = [ lib.maintainers.vbgl ];
+  };
+
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 1364bfe723c..feb412e320a 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1374,6 +1374,8 @@ let
 
     vchan = callPackage ../development/ocaml-modules/vchan { };
 
+    vector = callPackage ../development/ocaml-modules/vector { };
+
     vg = callPackage ../development/ocaml-modules/vg { };
 
     vlq = callPackage ../development/ocaml-modules/vlq { };