Story highlights B.B. King has canceled the remaining eight gigs of his current tour

The 89-year-old legend became ill following an October 3 show

He's been diagnosed with dehydration and exhaustion

Blues legend B.B. King was forced to cancel the remainder of his current tour after falling ill following a October 3 show at Chicago's House of Blues.

The 89-year-old Rock and Roll Hall of Famer had eight gigs left on his current trek, including stops at his namesake B.B. King Blues Club in New York.

"[King] was immediately evaluated by a doctor and diagnosed with dehydration and suffering from exhaustion whereby causing the eight remaining shows of his current tour to be canceled," King's official site posted . No other details about King's condition were revealed.

As EW's The Music Mix points out, King gave a shaky performance in St. Louis in April 2014, with the concert being so erratic that the blues great's reps issued a statement apologizing following the gig.

"The combination of the rigors of the very long drive and high blood sugar due to his medication error resulted in a performance that did not match Mr. King's usual standard of excellence," the statement read. King suffers from Type II diabetes, a condition he's lived with for two decades.