[Haskell-cafe] Quick Question for QuickCheck2

Hello, perhaps I am just blind or is it a difficult issue: I would like to generate Char values in a given Range for QuickCheck2. There is this simple example from the haskell book: instance Arbitrary Char where arbitrary = elements (['A'..'Z'] ++ ['a' .. 'z'] ++ " ~!@#$%^&*()") This does not work in QuickCheck2 since the instance is already defined. How do I achieve this behaviour in QC2? Thanks for helping. Sebastian