A lawsuit filed in Miami-Dade County has accused Marriott International of knowingly concealing the use of an odious and potentially harmful building material in one of its properties.

Montreal businessman Andreas Diamantopoulos is accusing Marriott of negligence and fraud over its addressing of an “unnatural smell” in his residence in the company’s St. Regis Bal Harbor Resort. Diamantopoulos — who goes by Andre Diamond — claimed to have continually reached out to St. Regis management over the presence of “a highly nauseating, repulsive, and repugnant odor” pervading his property. Diamond purchased a two-bedroom penthouse at the resort for $2,525,000 in 2013.