Apply patch from PR#5944

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13588 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
log PR#5944

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13590 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02