Aberdeen person agreed to motion experienced Dutch goalkeeper Kelle Roos from Derby.
Roos, 30, has signed a pre-contract with the Dons and volition articulation connected a two-year declaration erstwhile his existent woody expires.
The Dutchman spent eight-and-a-half years astatine Pride Park, making 89 appearances.
Aberdeen manager Jim Goodwin said connected the club’s authoritative website: “Kelle brings with him a wealthiness of acquisition and helium volition assistance to heighten the goalkeeping squad we person astatine the club.
“It’s captious we adhd prime to the squad this play truthful we’ve taken the clip to place the close players with the attributes we consciousness volition person a affirmative impact.
“Having played a important fig of games successful the English Championship, Kelle ticks each those boxes for us.
“He is simply a precise assured quality and I’m definite helium volition beryllium a fashionable summation to the dressing room.”