Newly-promoted Bundesliga side FSV Mainz 05 are set to sign Barnsley goalkeeper Heinz Muller.
The 31-year-old will put pen to paper on a three-year deal with the Rhinehessen side next week.
With Muller still under contract at Oakwell, Mainz have agreed a reported fee of £430,000 to secure his services.
Mainz general manager Christian Heidel told Frankfurter Rundschau newspaper: "Everything is said, this is a done deal.
"Heinz Muller will be an eye-to-eye contender with Dimo Wache."
The 35-year-old Wache has been the first-team Mainz goalkeeper for over a decade with almost 400 first-team appearances.