Matt Fraser scored at 1:19 of overtime to give the Boston Bruins a 1-0 victory over the Montreal Canadiens on Thursday night, tying the Eastern Conference semifinal series 2-2.
Fraser got a stick on a rebound after goalie Carey Price lost the puck in front of the net.
Game 5 is Saturday night in Boston.
Tuukka Rask made 33 saves for Boston, and Price stopped 34 shots.
Montreal outshot Boston 14-7 in the third period.