Doncaster have signed Papua New Guinea international Watson Boas on a two-year contract.
The 24-year-old half-back has made his loan move from Featherstone permanent, having scored nine tries in 17 games for the Dons last season.
Boas is currently on international duty with the Kumuls and is set to take part in the World Cup Nines this weekend.
Doncaster coach Richard Horne said: “I’m really pleased to have Watson joining us on a permanent deal for the next two years.
“His ability to play in the halves or at hooker makes him a key player for us and he showed last season how much his pace can hurt teams.
“He settled into the group really well and speaking with him he is ready to push on and improve even further with us next year.”