Andy Scott has admitted he may lose Josh Wright when his loan spell is up.
The Charlton midfielder has been at Griffin Park for the last three weeks after joining on a month's loan, and should be around for at least the trips to Notts County and Aldershot.
And Bees boss Scott conceded his impressive displays in the middle could make it difficult to extend Wright's loan.
Scott said: "Charlton are blooding a lot of their youngsters in the first team at the moment, so there's no guarantee we can keep him for longer.
"We'll have to see how Charlton feel, but they may well have seen how well he has been doing here and decide to recall him for their own purposes."