Spanish defender Castro Sito has signed a one-year contract with Ipswich.
The 25-year-old impressed in two trial games and could make his debut against Cardiff on Saturday following an injury to Jason de Vos.
The former Racing Ferrol star initially rejected Town's contract offer but he told the club website: "Ipswich are a big club and I wanted to sign.
"There were a few contractual problems. Now the problems have been sorted out and I have agreed to sign."