I'm trying out the ghc 7.10 RC and am seeing lots of warnings about Monoid and some symbols from Control.Applicative - e.g. The import of ‘Data.Monoid’ is redundant except perhaps to import instances from ‘Data.Monoid’ To import instances alone, use: import Data.Monoid() For now I'm wrapping the import with some CPP so that it will still compile with older ghc versions (and a probably-pointless attempt to be non-ghc-specific, since I have never tested my code with other compilers): #if (!defined(__GLASGOW_HASKELL__)) || (__GLASGOW_HASKELL__ < 710) import Control.Applicative (Applicative(pure), (<$>), (<*>)) import Data.Monoid (Monoid(..)) #else import Control.Applicative ((<$>)) #endif Is this the best way? Am I missing something really obvious? Thanks, Doug