  We calculate the elliptic flow of deuterons in Pb+Pb collisions at 2.76 TeV
per colliding nucleon-nucleon pair and show that it can be used to discriminate
between direct statistical production and coalescence. The emission from the
fireball is parametrized and tuned to reproduce transverse momentum spectra and
the elliptic flow of protons and pions. Coalescence leads to higher deuteron
elliptic flow than statistical production and agrees better with experimental
data. We attribute this observation to the varying size of the
nucleon-producing region for the emission in different azimuthal angles.
