In our paper 'Non-thermal emission in the lobes of Fornax A' (Persic & Rephaeli 2019) the dilution factor of the cosmic IR background (CIB) was incorrectly specified to be CCIB = 10-6.724 (section 2.1). The correct value is CCIB = 10-5.629: in the revised Fig. (1)-left shown here the updated Compton/FIR curves are correspondingly higher. Our main conclusion, namely that all the observed Fermi-LAT emission from the lobes of FornaxA can be accounted for by energetic electrons scattering off the ambient optical radiation field, is unaffected by this correction. (Figure Presented).