diff --git a/Mesh_3/include/CGAL/Mesh_3/properties_Surface_mesh.h b/Mesh_3/include/CGAL/Mesh_3/properties_Surface_mesh.h
index 8e5668c2d4e..11018218e7a 100644
--- a/Mesh_3/include/CGAL/Mesh_3/properties_Surface_mesh.h
+++ b/Mesh_3/include/CGAL/Mesh_3/properties_Surface_mesh.h
@@ -142,7 +142,7 @@ inline get(CGAL::face_patch_id_t<I>, Surface_mesh<P> & smesh)
 
 template <typename P>
 CGAL_MESH_3_PROPERTY_SURFACE_MESH_RETURN_TYPE(CGAL::face_patch_id_t<void>)
-inline get(CGAL::face_patch_id_t<void>, Surface_mesh<P> & smesh)
+inline get(CGAL::face_patch_id_t<void>, Surface_mesh<P> &)
 {
   typedef CGAL::Static_property_map<typename boost::graph_traits<Surface_mesh<P> >::face_descriptor,std::pair<int,int> > Pmap;
 
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Edit_polyhedron_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Edit_polyhedron_plugin.cpp
index 89b4fd0ccfe..8493ea9ed47 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Edit_polyhedron_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Surface_mesh_deformation/Edit_polyhedron_plugin.cpp
@@ -81,7 +81,6 @@ public Q_SLOTS:
 private:
   typedef CGAL::Three::Scene_interface::Item_id Item_id;
   std::vector<QColor> saved_color;
-  bool is_color_vector_read_only;
   Scene_edit_polyhedron_item* convert_to_edit_facegraph(Item_id, Scene_facegraph_item*);
   Scene_facegraph_item* convert_to_plain_facegraph(Item_id, Scene_edit_polyhedron_item*);
   void updateSelectionItems(Scene_facegraph_item* target);
diff --git a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
index 0adb4362940..0c4678759b1 100644
--- a/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
+++ b/Polyhedron/demo/Polyhedron/Scene_polyhedron_selection_item.h
@@ -785,7 +785,7 @@ public:
     poly_item->setItemIsMulticolor(b);
   }
 
-  void selection_changed(bool b) Q_DECL_OVERRIDE;
+  void selection_changed(bool b);
 
 Q_SIGNALS:
   void updateInstructions(QString);
diff --git a/Polyhedron/demo/Polyhedron/Scene_surface_mesh_item.h b/Polyhedron/demo/Polyhedron/Scene_surface_mesh_item.h
index ac1520f5a84..ed6084f735c 100644
--- a/Polyhedron/demo/Polyhedron/Scene_surface_mesh_item.h
+++ b/Polyhedron/demo/Polyhedron/Scene_surface_mesh_item.h
@@ -58,7 +58,6 @@ public:
 
   std::vector<QColor>& color_vector();
   void show_feature_edges(bool);
-  virtual void drawEdges() const {}
   SMesh* polyhedron();
   const SMesh* polyhedron() const;
 
@@ -89,7 +88,7 @@ public Q_SLOTS:
               double orig_z,
               double dir_x,
               double dir_y,
-              double dir_z);
+              double dir_z) Q_DECL_OVERRIDE;
   bool intersect_face(double orig_x,
                       double orig_y,
                       double orig_z,