The 31-year-old Manchester City full-back was signed in time to go straight into the squad for Wednesday night's Barclays Premier League clash with Norwich.
O'Neill said: "I'm hoping that with Wayne's undoubted experience and ability he can be a big help to the team until the end of the season. I'm very pleased to have him here and with the number of injuries we've sustained recently I'm sure he'll be a great help to us."
Source: PA
Source: PA