diff --git a/ocaml-bisect-ppx.spec b/ocaml-bisect-ppx.spec
index 7c7407e..b0fe2fb 100644
--- a/ocaml-bisect-ppx.spec
+++ b/ocaml-bisect-ppx.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 # Running the tests requires ocaml-ounit, which introduces a circular
 # dependency (also involving ocaml-lwt).  The tests also require ocamlformat,
 # introducing a second circular dependency.  Break the cycles with this