The clause will keep the striker at Old Trafford for another year. Berbatov’s current contract is set to expire at the end of the season.
Berbatov has been linked with a move away from Old Trafford after falling behind Javier Hernandez and Daniel Welbeck in the pecking order at United.
“Dimitar is still in my thoughts,” said Ferguson. “I have read some things but there is absolutely no reason for me to let him go.
“He is an outstanding footballer and we will give the extra year.
“It is unfortunate the form of Javier Hernandez over the last year has been outstanding but he (Berbatov) plays a great role and he trains well.
“He has no complaints. The boy is a great professional and we are happy for him to be here.
“You need a good number of strikers in the modern day. If you look back to 1999, we had four great strikers. They all played their part. That is exactly what will happen today.”
