Aberdeen are planning a fresh move for Dunfermline captain Scott Wilson as they bid to shore up their leaky defence.
The 30-year-old defender played for Calderwood when he was in charge at East End Park and was the subject of a failed bid during the January transfer window.
The experienced former Rangers stopper is perceived to be the perfect partner for Zander Diamond, as Calderwood aims to beef up his defence following a number of key departures.
"Clearly our defensive frailties are a major cause for concern. Our goal difference is minus 13 and, for a team of this standing, that's ridiculous.