diff --git a/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Scene_edit_polyhedron_item.cpp b/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Scene_edit_polyhedron_item.cpp
index 5e4b34e6ddb..520f06aa45c 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Scene_edit_polyhedron_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Scene_edit_polyhedron_item.cpp
@@ -916,7 +916,7 @@ struct Is_constrained_map<SMesh>
     :mesh(mesh)
   {
     icmap = mesh->add_property_map<sm_vertex_descriptor,int>("v:is_control", -1).first;
-    for(std::size_t i=0; i<vec->size(); ++i)
+    for(unsigned int i=0; i<vec->size(); ++i)
     {
       icmap[sm_vertex_descriptor(i)] = (*vec)[i];
     }
diff --git a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
index 0adb4362940..1f647ac0dd4 100644
--- a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
+++ b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
@@ -736,7 +736,7 @@ public:
     std::vector<Polyhedron::Point_3> points;
     points.reserve(selected_facets.size());
     VPmap vpm = get(CGAL::vertex_point, *polyhedron());
-    std::size_t counter = 1;
+    unsigned int counter = 1;
     for(Selection_set_facet::iterator fb = selected_facets.begin(); fb != selected_facets.end(); ++fb) {
       BOOST_FOREACH(fg_halfedge_descriptor hb, halfedges_around_face(halfedge(*fb,*polyhedron()),*polyhedron())){
         if(get(vertex_selection_map(), target(hb,*polyhedron())) == 0) {