Ronaldo says he will retire after the 2011 season.
The 33-year-old Brazilian striker extended his contract with Corinthians on Monday, and plans to play two more seasons before putting an end to a successful soccer career of more than 17 years.
Ronaldo said he is "hoping to have some fun and win many significant titles" with Corinthians before retiring and becoming an ambassador for the Brazilian club.
Ronaldo won the FIFA player of the year award in 1996, 1997 and 2002. He was on World Cup teams in 1994 and 2002, scoring 62 goals in 97 internationals for Brazil.