diff --git a/vcg/complex/algorithms/parametrization/distorsion.h b/vcg/complex/algorithms/parametrization/distorsion.h
index c5055fa3..27013348 100644
--- a/vcg/complex/algorithms/parametrization/distorsion.h
+++ b/vcg/complex/algorithms/parametrization/distorsion.h
@@ -178,7 +178,7 @@ namespace vcg {
 			static int Folded(const MeshType &m)
 			{
 				int folded=0;
-				for (int i=0;i<m.face.size();i++)
+				for (size_t i=0;i<m.face.size();i++)
 				{
 					if (m.face[i].IsD())continue;
 					if(Folded(&m.face[i]))folded++;