The former Sex Pistols manager died in Switzerland on Thursday after losing his fight with cancer.
According to The Daily Telegraph, his son with Vivienne Westwood, Joe Carre, was by his bedside with his half-brother Ben Westwood.
"His last words were 'Free Leonard Peltier'. Ben had a T-shirt with the slogan on and my father saw this and admired it. He was proud of Ben for this and he had a sense of humour to the end. He smiled," Carre said.
Supporters of Peltier, who is serving life for the murder of two FBI agents in 1975, claim that he is a political prisoner.
The music impresario's final wish was that he should be buried wearing a new suit in Highgate Cemetery in north London. "My father was a very special person - a person who changed the world," Carre said. "I am incredibly proud of him. He was an old warrior. The world would have been a very different place without him. He produced nothing short of a revolution."