diff --git a/src/BulletCollision/CollisionDispatch/btConvexPlaneCollisionAlgorithm.cpp b/src/BulletCollision/CollisionDispatch/btConvexPlaneCollisionAlgorithm.cpp
index 5b16a5e7e..c8b4e007a 100644
--- a/src/BulletCollision/CollisionDispatch/btConvexPlaneCollisionAlgorithm.cpp
+++ b/src/BulletCollision/CollisionDispatch/btConvexPlaneCollisionAlgorithm.cpp
@@ -71,9 +71,9 @@ void btConvexPlaneCollisionAlgorithm::processCollision (btCollisionObject* body0
 	btTransform convexInPlaneTrans;
 	convexInPlaneTrans= planeObj->getWorldTransform().inverse() * convexObj->getWorldTransform();
 
-	btVector3 vtx = convexShape->localGetSupportingVertexWithoutMargin(planeInConvex.getBasis()*-planeNormal);
+	btVector3 vtx = convexShape->localGetSupportingVertex(planeInConvex.getBasis()*-planeNormal);
 	btVector3 vtxInPlane = convexInPlaneTrans(vtx);
-	btScalar distance = (planeNormal.dot(vtxInPlane) - planeConstant) - convexShape->getMargin();
+	btScalar distance = (planeNormal.dot(vtxInPlane) - planeConstant);
 
 	btVector3 vtxInPlaneProjected = vtxInPlane - distance*planeNormal;
 	btVector3 vtxInPlaneWorld = planeObj->getWorldTransform() * vtxInPlaneProjected;