The Irishman signed a one-month loan at the start of the year which has now been extended.
Meanwhile boss Dave Penney has boosted his attacking options by signing Millwall striker Jason Price on a month's loan.
He goes straight into the squad for Tuesday's match at Stockport County.
And Crystal Palace keeper Darryl Flahavan has joined Oldham on loan until the end of the campaign.
The deal was completed minutes before the 5pm deadline and is Flahavan's second loan spell at Boundary Park this season.
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