Häcken is involved in the battle for places in Europe, but has been in swaying shape.
It also looked to be a heavy loss against Mjällby at home when Moses Ogbu scored 2-0 after an hour of play.
But the home team got up quickly.
Daleho Irandust reduced immediately.
Then Gustav Berggren fixed 2-2 in the 83rd minute.
"Lets in for easy goals"
In the final minutes, Häcken lined up goal chances and looked to have a third ball in goal, but Mjällby's defense cleared away on the goal line.
- We are terribly disappointed, says Berggren.
- We had a good enough position to win the match, then we let in for easy goals.