Stina Blackstenius has been sidelined with an injury since November 10.
She was selected in the national team and was said to be eligible for the meeting with Slovakia but never played during the gathering.
However, as Häcken now enters the final stages of the Champions League group stage, the star is ready to start Thursday's meeting with Bayern Munich.
- I'm very happy of course.
A very skilled player who does a lot of good for us.
That she is available to us makes me very happy, says coach Robert Vilahamn to SVT Sport.
"Feeling ready"
Blackstenius made 30 minutes during a training match against the Danish team Köge earlier this week and is looking forward to making his competition debut.
- I am of course happy to be here again and to have a Champions League match to look forward to.
I have been able to train since I came back and feel ready.
But there are questions about Blackstenius' future.
The goal thief won the shooting league in the Allsvenskan with his 17 goals and was also a success during the Olympics.
The contract with Häcken expires at the turn of the year.
"Want to be involved and contribute"
- If something else is going to happen, it's next season, I want to end in the best way with Häcken.
Hopefully we have an endgame to aim for.
I want to be involved and contribute.
Blackstenius said at the press conference the day before the meeting with Bayern that there is interest from foreign clubs and that she has "a dialogue with Häcken".
- So far no decision has been made and I have not written anything.
I do not comment more than that.
It's coming when it's done, which it's not yet.
Then I could have said more.