Disclosed is a supplemental support that is designed to prevent a knee brace from migrating out of position. The device comprises an inelastic, elongated strap with hook fasteners on its inward surface and loop fasteners on its outward surface adapted to connect a knee brace to a waist support. A loop is provided at the upper end of the strap for securing to a conventional waist belt, while a protective cover secures over any exposed length of strap to prevent chaffing or damage to clothing. The hook fasteners secure to the neoprene fabric or any exposed loop fasteners on a conventional knee brace, or alternatively the strap is inserted between the brace straps and the neoprene to ensure that the brace does not move along the users leg. When positioned between a waist belt and a knee brace, the device ensures the brace remains in position during activity.