At the 3PN order (taking into account the tails of tails), we find that r 0 does not completely cancel out after the replacement of U by the right-hand side of Equation (100View Equation). The reason is that the moment M L also depends on r 0 at the 3PN order. Considering also the latter dependence we can check that the 3PN radiative moment U L is actually free of the unphysical constant r 0.