The musician is rumoured to be too ill to reunite with his bandmates for their upcoming comeback shows at Heaton Park and beyond.
Dodgy drummer Mathew Priest made the claims during an interview on XFM, saying: "I bought tickets because The Roses were one of my favourite bands and Reni was playing.
"But I've heard rumours that Reni might not be playing - he's not well apparently and they're rehearsing with another drummer. They've sold a lot of the 250,000 tickets because of Reni - I'd want to see them with Reni."
However, a spokesperson denied the comments, stating: "The Stone Roses are currently rehearsing for their forthcoming dates. All four members can't wait to play the shows."
The Stone Roses announced that they would be reforming last year and later signed record deals in the UK and the US for new material.
The band are scheduled to headline at the V Festival in August, and will also play a number of dates in Europe.
Dodgy released their fifth studio LP Stand Upright In A Cool Place earlier this year.
Watch the video for The Stone Roses' 'Fools Gold' below: