if mcmin is not None:
        mcmin_maxm1, mcmin_minm2 = mchirp_eta_to_mass1_mass2(mcmin, etamin)
        mcmin_minm1, mcmin_maxm2 = mchirp_eta_to_mass1_mass2(mcmin, etamax)
        if mcmin_maxm1 > m1max:
            mcmin_maxm1 = m1max