Jackie, who had made his debut in Bengali cinema with Rituparno Ghosh's 'Antarmahal', said he had long wanted to dub lines in his own voice as that would add more authenticity to the character.
"It was the director's prerogative and I am happy the way my character of the representative of a decaying gentry came across on the screen in 'Antarmahal'. I had wished to do more work with him," Jackie said during the on-location shoot of 'Swabhumi', based on Mahashweta Devi's novel Adhoba.
One of Jackie's shots in the movie involve visiting an anti-land acquisition movement site, and giving some instructions to the men in uniform in Bengali.
The actor, who said he was aware of the land movement that had rocked Bengal in 2007, is currently doing post-production dubbing to lip-sync the words later.
'Swabhumi' is being directed and partly produced by 'Escape from Taliban' and 'White Mischief' director Ujjwal Chatterjee.