  We investigate shadowing corrections to the polarized deuteron structure
functions g_1^d and b_1. In the kinematic domain of current fixed target
experiments we observe that shadowing effects in g_1^d are approximately twice
as large as for the unpolarized structure function F_2^d. Furthermore, we find
that b_1 is surprisingly large at x < 0.1 and receives dominant contributions
from coherent double scattering.
