The Court of Arbitration for Sport (CAS) have granted Chelsea's request to suspend their transfer ban.
Fifa ruled against Chelsea in August when they ruled the English club had induced teenager Gael Kakuta to break his contract with Lens.
As punishment for this, the world's governing body imposed a transfer ban on Chelsea and stated they could not register new players for two transfer windows.
This meant Chelsea would not be able to sign a new player until 2011 - but now The Blues have successfully lobbied CAS that their ban should be suspended until their full appeal against Fifa's decision is heard by the Swiss-based court.
That now means that Chelsea will be in a position to buy players in January, if they wish.
CAS also ruled that Gael Kakuta - who was banned from playing for four months - has also had his suspension 'stayed' making him available for selection.
The CAS statement read: "The Court of Arbitration for Sport (CAS) has granted the request for a stay filed by Chelsea Football Club Ltd and Mr Gaël Kakuta in relation to the decision taken by the Fifa Dispute Resolution Chamber on 27 August 2009.
"The Fifa Dispute Resolution Chamber imposed, inter alia, a restriction of four months' ineligibility on Mr Gael Kakuta, and Chelsea Football Club Ltd was banned from registering any new players, either nationally or internationally, for the next two complete, consecutive registration periods.
"Such sanctions are now stayed until the CAS renders its final decision in
this matter."