Koren has made 30 international appearances for Slovenia
Slovenia international Robert Koren has agreed a new two-year deal at West Brom with an option for an additional year.
The 27-year-old midfielder follows defender Paul Robinson in signing a new deal with the Premier League newcomers.
Koren was Tony Mowbray's first signing as West Brom boss, arriving on a Bosman free transfer from Lillestrom in 2007.
"He has become an important member of the squad over the past 19 months and has a terrific attitude," Mowbray told the club's official website.
Meanwhile, West Brom have ended goalkeeper Michal Danek's loan spell.
The 25-year-old Danek, who joined West Brom in January, is to return to Viktoria Plzen in the Czech Republic without having played a competitive game for the club.
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