  The amplitude for the anomalous transitions gamma pi(+) -> pi(0) pi(+) is
analyzed within Chiral Perturbation Theory including electromagnetic
interactions. The presence of a t-channel one-photon exchange contribution
induces sizeable e^2 corrections which enhance the cross-section in the
threshold region and bring the theoretical prediction into agreement with
available data. In the case of the crossed reaction gamma pi(0) -> pi(+) pi(-),
the same contribution appears in the s-channel and its effects are small.
