diff --git a/ocaml-odoc.spec b/ocaml-odoc.spec
index ff06615..df50b9a 100644
--- a/ocaml-odoc.spec
+++ b/ocaml-odoc.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 Name:           ocaml-odoc
 Version:        2.2.0
 Release:        5%{?dist}