Alaba extends Bayern contract
The 19-year-old Austria international is now tied to the club until June 2015.
Bayern sporting director Christian Nerlinger said: "We are very pleased to tie such a young and talented player to the club long-term.
"In the coming weeks we will decide together David's short-term future and what is best for all parties."
Alaba spent last season on loan at Hoffenheim, scoring twice in 17 appearances.