diff --git a/supermin.spec b/supermin.spec
index 0488ebd..bbd77b0 100644
--- a/supermin.spec
+++ b/supermin.spec
@@ -1,3 +1,6 @@
+# OCaml packages not built on i686 since OCaml 5 / Fedora 39.
+ExcludeArch: %{ix86}
+
 # On platforms and architectures that support it, the default is
 # ‘--with dietlibc’.
 #