The American superstar, still unbeaten in 46 professional fights, and Argentine Maidana (35-3) were involved in an entertaining bout in May.
Mayweather successfully defended his WBC welterweight crown and took Maidana's WBA title after a tight contest.
And a repeat is on the cards on September 13.
"#Mayhem Mayweather vs. Maidana 2 September 13, 2014 MGM Grand in Las Vegas Live on Showtime PPV," Mayweather tweeted on Thursday.
Maidana, 30, surprised many in May, with one judge scoring the fight 114-114, while two others had it 117-111 and 116-112 in Mayweather's favour.
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