Nigerian president Muhammadu Buhari denies claims that he died and was replaced by a Sudanese imposter, breaking his silence on a rumor that has circulated on social media for months.

Buhari, who is running for re-election in February, spent 5 months in the UK last year, receiving treatment for an undisclosed illness. One theory widely shared on social media and by some political opponents was that he had been replaced by a lookalike from Sudan called Jubril.

Buhari told Nigerians in a town hall session on Sunday, “It’s the real me, I assure you. I will soon celebrate my 76th birthday and I will still go strong.”