Lindsay Lohan has come clean about her drug addiction for the first time, taking to her Twitter account for a lengthy confession after news broke that she’d failed her first court-ordered drug test since leaving rehab early.

“Regrettably, I did in fact fail my most recent drug test and if I am asked, I am prepared to appear before Judge Fox next week as a result,” she posted. “Substance abuse is a disease, which unfortunately doesn’t go away over night… This was certainly a setback for me but I am taking responsibility for my actions and I’m prepared to face the consequences.”

Lohan could face another 30 days in jail for violating her probation.