We present the results of a renormalization group calculation of the s
uperfluid density of He-4 near T-lambda at finite superfluid velocity
v(s). Within the phi(4) model for an order parameter with O(n) symmetr
y and using field theory in three dimensions, we have computed to two-
loop order the amplitude function for the superfluid density up to O((
v(s)/v(sc))(2)). We also give the two-loop expression for the amplitud
e function of the order parameter at v(s) = 0. Applications of these r
esults are briefly discussed.