However Campo has now signed a two year deal with Town after he passed his medical.
Campo was not offered a new deal by the Bolton Wanderers boss, to the surprise of many Bolton fans, and left the club as a free agent.
Campo could make his debut as early as next Saturday, although question marks regarding his fitness could delay this.
Magilton told the club's official website: "Ivan has a wealth of experience having played at the highest level for many years and he can be a great asset for us.
"The young players at this club will really benefit from having him around the place."