diff --git a/ocaml-sedlex.spec b/ocaml-sedlex.spec
index 5b15652..06d1a02 100644
--- a/ocaml-sedlex.spec
+++ b/ocaml-sedlex.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 Name:           ocaml-sedlex
 Version:        3.2
 Release:        1%{?dist}