This letter presents an updated measurement of the lifetime of the B-s
(0) meson using 3.6 million hadronic Z(0) decays recorded by the OPAL
detector at LEP from 1990 to 1994. A sample of B-s(0) decays is obtain
ed using D(s)(-)l(+) combinations, where the D-s(-) is reconstructed i
n either the phi pi(-) or KK-0(-) decay mode. From 79 +/- 13 D(s)l co
mbinations attributed to B-s(0) decays in this data sample, we measure
tau(B-s(0)) = 1.54(-0.21)(+0.25) +/- 0.06 ps, where the errors are st
atistical and systematic, respectively.