Scottish champions Celtic were granted special dispensation to sign Manchester City striker John Guidetti on Thursday.

The Glasgow club tried to sign the Guidetti on loan just before the transfer window shut on Monday, but part of the paperwork arrived just after midnight.

However, an appeal to world governing body FIFA by the Scottish football authorities has succeeded.

"After checking the documentation received and the information contained in the international transfer matching system managed by FIFA TMS, the Scottish Football Association was informed today that the envisaged loan deal may proceed," a FIFA spokesperson said.

Both Celtic and English champions City then confirmed that Sweden international Guidetti had joined Ronny Deila's side on a season-long loan deal.

"Delighted to have finally joined @celticfc on loan ... Can't wait to get started and play in front those fans #TheBhoys," Guidetti wrote on Twitter.

The bureaucratic hitch might yet prevent Guidetti playing in the Europa League group stages as the deadline for the submission of squads was midnight on Tuesday.

Guidetti is looking to rejuvenate his career after injury and illness derailed his progress.

He scored 20 goals in 23 games for Feyenoord on a loan spell in 2011-12 and made his Sweden debut, but a problem with his leg, which was caused by illness, ruled him out of Euro 2012.

He came back to City last season before a loan spell at Stoke produced only six substitute appearances but no goals.