In a recent paper by Bataller (Appl Math Comput 198 333–338, 2008) the effect of radiation on the classical Blasius flow along a stationary plate in a horizontal free stream was considered. The results in that paper have been produced using a linearized Rosseland approximation, which is valid only for small temperature differences between the plate and the ambient fluid. In the present work, we extend the above work to non-linear Rosseland approximation which is valid for both small and large temperature differences.