diff --git a/vcg/complex/algorithms/update/quality.h b/vcg/complex/algorithms/update/quality.h
index c6dc7ebd..df86f2db 100644
--- a/vcg/complex/algorithms/update/quality.h
+++ b/vcg/complex/algorithms/update/quality.h
@@ -230,11 +230,11 @@ static void FaceArea(MeshType &m)
 		(*fi).Q()=vcg::DoubleArea(*fi)/2;
 }
 
-static void VertexFromPlane(MeshType &m, Plane3<ScalarType> &pl)
+static void VertexFromPlane(MeshType &m, const Plane3<ScalarType> &pl)
 {
   VertexIterator vi;
   for(vi=m.vert.begin();vi!=m.vert.end();++vi) if(!(*vi).IsD())
-    (*vi).Q() =Distance(pl,(*vi).cP());
+    (*vi).Q() =DistancePlanePoint(pl,(*vi).cP());
 }
 
 static void VertexFromGaussianCurvature(MeshType &m)