Leyton Orient haved signed defender Michael Liddle on loan from Sunderland.
The 20-year-old is set to go straight into the starting line-up for the season-opener against Yeovil as cover for injured left-back Charlie Daniels.
"I'm really pleased to have brought in a left-back in time for the start of the season," said Os boss Russell Slade.
"We know Charlie will be out for a few weeks so it was important to sign a left-back and I'm sure Michael will do well for us.
"He has experience of this division from a spell with Carlisle and we're looking forward to working with him here."