[Haskell-beginners] the first argument of take is an Int and not Integral..

Hi everybody, I feel forcing the first argument of take to be an Int is unnecessarily restrictive .. Is there a rationale behind not making it just (Integral a) ? right now it is take::Int->[a]->[a] I was thinking may be take::(Integral b)=>b->[a]->[a] would be better... Thanks, Sunil.