[Haskell-cafe] What extension do I need to write "type Job = Map k a"?

Hi, I've forgotten this. This is OK: type Job k a = Map k a And this is OK: {-# LANGUAGE RankNTypes #-} -- or LiberalTypeSynonyms? type Job = forall a. forall k. Map k a Then how to write it like this? type Job = Map k a -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.