  We determine the first correction to the quadrupole operator in high-energy
QCD beyond the TMD limit of Weizsaecker-Williams and linearly polarized gluon
distributions. These functions give rise to isotropic resp. ~ cos 2 phi angular
distributions in DIS dijet production. On the other hand, the correction
produces a ~ cos 4 phi angular dependence which is suppressed by one additional
power of the dijet transverse momentum scale (squared) P^2.
