Aberdeen have signed 29-year-old former Ross County defender Paul Quinn on a two-year deal.
Quinn began his career at Motherwell and also played for Cardiff City and Doncaster Rovers before a spell in Dingwall last season.
Dons boss Derek McInnes told the club website: "I'm delighted to sign Paul, who has been a major influence on Ross County's form in the second half of the season.
"We've watched Paul on several occasions in the last few months and the key qualities he will bring to the team are experience, leadership and competitiveness. You cannot have too many leaders on the pitch."