diff --git a/ocaml-ocamlbuild.spec b/ocaml-ocamlbuild.spec
index 9c390cc..b236bbc 100644
--- a/ocaml-ocamlbuild.spec
+++ b/ocaml-ocamlbuild.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 # NOTE: there is no devel subpackage because the main package *IS* a devel
 # package.