fix compilation for 401 and 400
fix compilation for 401 and 400

chambart/merlin,chriskonstad/merlin,chriskonstad/merlin,fxfactorial/merlin,chambart/merlin,fxfactorial/merlin,haselwarter/merlin,rgrinberg/merlin,neojski/merlin,rgrinberg/merlin,rgrinberg/merlin,haselwarter/merlin,haselwarter/merlin,fxfactorial/merlin,chambart/merlin,ocaml/merlin,ocaml/merlin,neojski/merlin,fxfactorial/merlin,the-lambda-church/merlin,dra27/merlin,dra27/merlin,the-lambda-church/merlin,neojski/merlin,dra27/merlin,neojski/merlin,dra27/merlin,ocaml/merlin,the-lambda-church/merlin,haselwarter/merlin,rgrinberg/merlin,chambart/merlin,ocaml/merlin