Peroneal subluxation and dislocation is a well-known condition due to injury of the lateral ankle. The acute injury is frequently misdiagnosed as a lateral ankle sprain. Difficulty in establishing the correct diagnosis or inadequate initial treatment may lead to recurrent subluxation or chronic dislocation of the tendons. Many surgical techniques have been described to treat this condition. These range from simple soft-tissue repairs to complicated dissection and groove-deepening procedures. We present a novel technique that deepens the groove with limited dissection of the soft tissues and periosteum.