  We compute next-to-leading order QCD corrections to the top-bottom
interference contribution to H+j production at the LHC. To achieve this, we
combine the recent computation of the two-loop amplitudes for gg -> Hg and qg
-> Hq, performed in the approximation of a small b-quark mass, and the
numerical calculation of the squared one-loop amplitudes for gg -> Hgg and qg
-> Hqg performed within OpenLoops. We find that QCD corrections to the
interference are large and similar to the QCD corrections to the top-mediated
Higgs production cross section. We also observe a significant reduction in the
mass-renormalization scheme uncertainty, once the NLO QCD prediction for the
interference is employed.
