Aberdeen have signed 21-year-old Reading centre-back Michael Hector on loan for the first half of the season.
The defender has had previous loan spells at Barnet, Shewsbury, Aldershot and Cheltenham.
Aberdeen manager Derek McInnes moved into the transfer market after Clark Robertson and Russell Anderson were taken off with minor injuries during the midweek friendly defeat at Peterhead.
McInnes told the club's official website: "With the current defensive injury situation, I'm delighted to have been able to bring in Michael, who is a big strong lad who comes with a good pedigree.
"Michael's arrival concludes things as far as players coming in is concerned while we are looking at loan deals going the other way for one or two of our younger lads."