Ben Chiarot scored in overtime and Cayden Primeau made 35 saves for his first NHL victory in the Montreal Canadiens' 3-2 victory over the Ottawa Senators on Wednesday night.

Chiarot scored 1:11 into the extra period on a 2-on-1 with Max Domi.

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Players from the Montreal Canadiens celebrate after defeating the Ottawa Senators in an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ben Chiarot scored in overtime and Cayden Primeau made 35 saves for his first NHL victory in the Montreal Canadiens' 3-2 victory over the Ottawa Senators on Wednesday night.

Ottawa Senators goaltender Anders Nilsson is scored on by Montreal Canadiens' Tomas Tatar as Canadiens' Brendan Gallagher (11) looks for the rebound during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Brady Tkachuk and Connor Brown scored for the Senators, and Anders Nilsson made 26 saves.

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

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Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ottawa Senators' Nick Paul (13) moves in on Montreal Canadiens goaltender Cayden Primeau as Canadiens' Ryan Poehling defends during the second period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ottawa Senators' Nick Paul (13) moves in on Montreal Canadiens goaltender Cayden Primeau as Canadiens' Ryan Poehling defends during the second period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Nick Cousins and Tomas Tatar scored in regulation for the Canadiens. They improved to 15-11-6, winning for the third straight time after losing four of five.

Players from the Montreal Canadiens celebrate after defeating the Ottawa Senators in an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Players from the Montreal Canadiens celebrate after defeating the Ottawa Senators in an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Brady Tkachuk and Connor Brown scored for the Senators, and Anders Nilsson made 26 saves.

Montreal was playing the second half of a back-to-back after beating Pittsburgh 4-1 on Tuesday night.

Notes: The 20-year-old Primeau is the son of former NHL player was the 199th overall draft pick in 2017. ... Ottawa’s NHL-worst power play went 1 for 5.

Ottawa Senators goaltender Anders Nilsson is scored on by Montreal Canadiens' Tomas Tatar as Canadiens' Brendan Gallagher (11) looks for the rebound during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ottawa Senators goaltender Anders Nilsson is scored on by Montreal Canadiens' Tomas Tatar as Canadiens' Brendan Gallagher (11) looks for the rebound during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

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Senators: Hosts Columbus on Saturday.

Canadiens: Host Detroit on Saturday night.

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Montreal Canadiens' Ryan Poehling (25) moves in on Ottawa Senators goaltender Anders Nilsson during the third period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ottawa Senators' Nick Paul (13) moves in on Montreal Canadiens goaltender Cayden Primeau as Canadiens' Ryan Poehling defends during the second period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)

Ottawa Senators' Nick Paul (13) moves in on Montreal Canadiens goaltender Cayden Primeau as Canadiens' Ryan Poehling defends during the second period of an NHL hockey game, Wednesday, Dec. 11, 2019 in Montreal. (Graham HughesThe Canadian Press via AP)