Phil Smith joined Pompey as a free agent in December 2012, having been without a club since leaving Swindon the previous summer.
Pompey set to sign triallist keeper Phil Smith.
The former Swindon man is set to arrive at the club in time to face Tranmere on Saturday.
The 32-year-old was invited to join on trial at the start of the week, after being without a club since his release from the County Ground in the summer.
Goalkeeping coach John Keeley has run the rule over Smith and the coaching staff have now decided to offer him a short-term deal.
It will be Simon Eastwood who will get the nod to start at Prenton Park this weekend, however.
Caretaker boss Guy Whittingham said: ‘We are hoping to sort something out with Phil. Hopefully he’ll be okay for Saturday.
‘We’ve got him in for his experience, but we need cover.’