The 24-year-old son of actor Ryan O'Neal and the late actress Farrah Fawcett has long battled substance abuse problems and has been arrested several times for drug offenses.
He had been in a private drug treatment facility since September after serving time in jail, but officials told People.com he was arrested again for a drug violation Dec. 29.
People.com said a judge Tuesday ordered O'Neal to spend 30 days in a prison rehab.
He is to be sentenced Feb. 2 for violating the terms of his probation, the report said.
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