[en] In a recent paper Jamieson, Dalgarno, and Yukich [Phys. Rev. A 46, 6956 (1992)] discuss the elastic scattering of two hydrogen atoms at very low collision energies. They use as an input to their numerical calculations the potential-energy curve of the ³Σ_u⁺ state obtained from a configuration-interaction (CI) calculation and report a triplet scattering length that is much larger than found previously. We show that the difference is a consequence of the neglect of a systematic shift in the b ³Σ_u⁺ curve. Furthermore, we show that by taking the systematic shift into account, the scattering length of the CI potential reduces to a value of (1.2±0.2)a₀, which is in agreement with previous results