[NTG-context] Typesetting >> in verbatim

Hi, I am having problems typing ">>" when typesetting code within a \definetyping environment. I hope someone might be able to give me a hint. My code looks as follows: \definetyping [Haskell] [ option=commands, before={\startframedtext[width=\makeupwidth, frame=off,bottomframe=on,topframe=on, background=screen,backgroundscreen=.90]}, after={\stopframedtext}, bodyfont=9pt, margin=1.5em] \startHaskell main = foo >>= bar \stopHaskell Whenever ConTeXt comes across >> anywhere in the text, it just doesn't typeset anything. So in the above case, I get the output: main = foo = bar Thanks for you help! Thomas