Jordan Roberts has joined from Heart of Midlothian on a permanent basis.
The forward, who has been on loan at Fir Park for the last year, has signed until the summer.
“We’re delighted to bring Jordan back permanently,” manager Graham Alexander said of the signing.
“We know what qualities he brings to the side and, having only spent a few weeks away, returns to the group ready to pick up again immediately.”
The 28-year-old had a successful first spell with the club in the second half of the 2020/21 season, netting three goals in eight appearances before injury curtailed his season.
He returned in the summer to add another 11 appearances in claret and amber, and now stays on until at least the end of the 2021/22 campaign.