The paper “On the effective field theory of heterotic vacua“, by Jock McOrist, has been published in Letters in Mathematical Physics. The effective field theory of heterotic vacua that realise R(3,1) preserving N=1 supersymmetry is studied. In a previous paper the kinetic terms for moduli were calculated, deducing the moduli metric and Kähler potential. In this paper, the remaining couplings in the effective field theory are computed, correct to first order in α‵. A link to the published version (open access) is here.