Chris Maguire will remain at Pompey until the end of the season.
The Football League have granted permission for the Scottish striker to extend his Fratton Park loan stay.
Maguire had initially arrived from Derby on a 28-day loan with a view to staying longer.
Now that has been given the green light, ensuring the former Aberdeen man will continue to lead the Blues’ fight against relegation.
Maguire has scored twice in six matches since joining last month.