We have examined the double-beta decay mode accompanied by Majoron emission. After 223 days of measurement corresponding to about 615 kg d or 19.3 mol yr of exposure we find a lower half-life limit for this decay channel of T⁰ᵛˣ₁/₂ ˃ 1.66(1.99) × 10²² yr [90% (68%) C.L.] yielding a new limit for the Majoron-neutrino coupling of 〈 gᵥₓ 〉 < 1.8 × 10⁻⁴ (90% C.L.).