It is well known that the bosonized version of the Wakimoto constructi
on allows the explicit realization of any affine algebra (g) over cap,
with arbitrary level k in the homogeneous gradation, in terms of dim(
g) free bosonic fields. In this Letter we show, in the case of the sim
plest affine algebra <(sl(2))over cap>, that the bosonized Wakimoto re
alization can be extended to the principal gradation only when Ic is e
qual to the critical level, i.e., -2. In this case, this construction
can be achieved in terms of arbitrary number (larger than 1) of free b
osonic fields.