[Haskell-cafe] Cannot read a large integer on linux

Hello, I am encountering a strange issue while trying to read a string into an integer. On windows 7 64bit, I have:

read "18780189038289e49" :: Integer =187801890382890000000000000000000000000000000000000000000000000

On linux (64bit, libgmp.so.3.5.2) I have:

read "18780189038289e49" :: Integer *** Exception: Prelude.read: no parse

That's weird and I really have no clue what's going on. I use ghci 7.4.2 on linux and 7.4.1 on windows. What am I doing wrong ? Arnaud