We consider constraints on the isoscalar S-wave pi-N scattering length
a(+) from pi-deuteron scattering, to third order in small momenta and
pion masses in chiral perturbation theory. To this order, the pi-deut
eron scattering length is determined by a(+) together with three-body
corrections that involve no undetermined parameters. We extract a nove
l value for a combination of dimension two low-energy constants which
is in agreement with previous determinations.