Celtic claim a fee was agreed with Manchester City for John Guidetti prior to them taking the striker on loan.
The Scottish Premiership champions hope those talks will prove beneficial, with the Sweden international having become a much sought-after commodity.
Guidetti has netted 10 times in 11 domestic appearances this season to draw admiring glances from afar.
Despite being untested in the Premier League, following a forgettable loan spell at Stoke City last season, a return to England in January has been mooted for the 22-year-old.
Celtic are, however, understandably keen to keep the in-form frontman at Parkhead.
Manager Ronny Deila intends to address the issue when the transfer window re-opens, with it important to move quickly if a previous deal with Guidetti’s parent club is to be honoured.
He said in the Daily Record: “With every player we bring in on loan we try to have an option to buy.
“That’s why we know what it will cost.
“It could be harder at the end of the season. This decision has to be taken before that.
“He should stay here. He will develop and achieve big things. This is the right club for him, especially at the age he is now.”