NASHVILLE, Tenn. (AP) — Tennessee officials must deactivate a death-row inmate ‘s implanted heart-regulating device to avert the risk that it might try to shock him during his lethal injection, a judge ruled Friday.

The order by Nashville Chancellor Russell Perkins comes ahead of the Aug. 5 execution of Byron Black. Black’s attorneys have said that the implantable cardioverter-defibrillator could shock him in an attempt to restore his heart’s normal rhythm after the single dose of pentobarbital, with the potential for multiple rounds of shocks and extreme pain and suffering.

The order requires the state to deactivate the device moments before administering the lethal injection, including having medical or certified technician professionals, plus equipment, on hand. The lower-court judge said the order will not serve to delay the execution, something he said he does not have the authority to do. He also said it doesn’t add an undue administrative or logistical burden for the state.

Black’s attorneys say the only surefire way to shut off the device is for a doctor to place a programming device over the implant site, sending it a deactivation command. It is unclear how quickly the state could find a medical professional willing to do the deactivation. Additionally, the state is almost certain to file a quick appeal.