diff --git a/src/BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.cpp b/src/BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.cpp
index d964e1e48..25d58d61b 100644
--- a/src/BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.cpp
+++ b/src/BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.cpp
@@ -62,10 +62,12 @@ void	btScaledBvhTriangleMeshShape::processAllTriangles(btTriangleCallback* callb
 	scaledAabbMin[0] = m_localScaling.getX() >= 0. ? aabbMin[0] * invLocalScaling[0] : aabbMax[0] * invLocalScaling[0];
 	scaledAabbMin[1] = m_localScaling.getY() >= 0. ? aabbMin[1] * invLocalScaling[1] : aabbMax[1] * invLocalScaling[1];
 	scaledAabbMin[2] = m_localScaling.getZ() >= 0. ? aabbMin[2] * invLocalScaling[2] : aabbMax[2] * invLocalScaling[2];
+	scaledAabbMin[3] = 0.f;
 	
 	scaledAabbMax[0] = m_localScaling.getX() <= 0. ? aabbMin[0] * invLocalScaling[0] : aabbMax[0] * invLocalScaling[0];
 	scaledAabbMax[1] = m_localScaling.getY() <= 0. ? aabbMin[1] * invLocalScaling[1] : aabbMax[1] * invLocalScaling[1];
 	scaledAabbMax[2] = m_localScaling.getZ() <= 0. ? aabbMin[2] * invLocalScaling[2] : aabbMax[2] * invLocalScaling[2];
+	scaledAabbMax[3] = 0.f;
 	
 	
 	m_bvhTriMeshShape->processAllTriangles(&scaledCallback,scaledAabbMin,scaledAabbMax);