diff --git a/pkgs/development/ocaml-modules/yuscii/default.nix b/pkgs/development/ocaml-modules/yuscii/default.nix
new file mode 100644
index 000000000000..499c4d57d4d4
--- /dev/null
+++ b/pkgs/development/ocaml-modules/yuscii/default.nix
@@ -0,0 +1,33 @@
+{ alcotest
+, buildDunePackage
+, fetchzip
+, fmt
+, lib
+, uutf
+}:
+
+buildDunePackage rec {
+  pname = "yuscii";
+  version = "0.3.0";
+
+  src = fetchzip {
+    url = "https://github.com/mirage/yuscii/releases/download/v${version}/yuscii-v${version}.tbz";
+    sha256 = "0idywlkw0fbakrxv65swnr5bj7f2vns9kpay7q03gzlv82p670hy";
+  };
+
+  useDune2 = true;
+
+  checkInputs = [
+    alcotest
+    fmt
+    uutf
+  ];
+  doCheck = true;
+
+  meta = {
+    description = "A simple mapper between UTF-7 to Unicode according RFC2152";
+    license = lib.licenses.mit;
+    homepage = "https://github.com/mirage/yuscii";
+    maintainers = with lib.maintainers; [ superherointj ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index c9c16d00beda..12ed99e5d190 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1416,6 +1416,8 @@ let
 
     yojson = callPackage ../development/ocaml-modules/yojson { };
 
+    yuscii = callPackage ../development/ocaml-modules/yuscii { };
+
     z3 = callPackage ../development/ocaml-modules/z3 {
       inherit (pkgs) z3;
     };