On the Bose-Einstein Effect and the W Mass

We present an implementation of the Bose - Einstein effect in a Monte Carlo generator for $W^{-}{W}^{+}$ production in the $e^{-}{e}^{+}$ annihilation by means of the weight method. We check that the shift of the W mass in four jet events due to this effect is similarly small as for the other prescription used recently by Jadach and Zalewski. Possible generalization of this result is shortly discussed.