The deal announced Wednesday runs through the 2018-19 season. It comes after the team agreed to a six-year extension with goalie Corey Crawford through 2019-20 on Monday.
Hjalmarsson helped the Blackhawks win their second Stanley Cup in four years last season, recording five assists and a plus-10 plus/minus rating in 23 playoff games.
A fourth-round draft pick by Chicago in 2005, Hjalmarsson has 56 points (9 goals, 47 assists) and a plus-48 rating in 306 career regular-season games to go with 17 points (one goal, 16 assists) in 75 playoff games.
There's not much to say. We played like [garbage]. I think every guy in the room should be completely embarrassed about how they played tonight. Every single person. To start a road trip, one of the biggest road trips and have a division rival chasing you down and have a ton on the line, it's ridiculous how we played tonight.
— Anaheim forward Andrew Cogliano after the Ducks' 7-2 loss to the Flames on Wednesday