diff --git a/pkgs/development/ocaml-modules/cow/default.nix b/pkgs/development/ocaml-modules/cow/default.nix
index 5fee7a517f92..5b9a624625b3 100644
--- a/pkgs/development/ocaml-modules/cow/default.nix
+++ b/pkgs/development/ocaml-modules/cow/default.nix
@@ -36,6 +36,7 @@ buildDunePackage rec {
       Markdown, to name but a few! This library provides OCaml combinators
       for these web formats.
     '';
+    homepage = "https://mirage.github.io/ocaml-cow/";
     license = lib.licenses.isc;
     maintainers = with lib.maintainers; [ sternenseemann ];
   };