Lunt who has a year left on his contract at parent club Sheffield Wednesday but maybe surplus during the summer if the Runcorn born defender can have his remaining year paid up.
Lunty stays until the end of the season.
The extension of the loan will now be subject to confirmation from the Football League. 28-year-old Lunt signed on loan in the middle of February initially for a month and has featured three times as the Railwaymen look to get out of the relegation zone.