diff --git a/Polyhedron/demo/Polyhedron/Plugins/PMP/Fairing_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/PMP/Fairing_plugin.cpp
index be5c8a32a45..89e5a885f55 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/PMP/Fairing_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/PMP/Fairing_plugin.cpp
@@ -92,6 +92,7 @@ public Q_SLOTS:
         selection_item->selected_vertices,
         CGAL::Polygon_mesh_processing::parameters::fairing_continuity(continuity));
     selection_item->changed_with_poly_item();
+    selection_item->invalidateOpenGLBuffers();
     QApplication::restoreOverrideCursor();
   }
 
@@ -116,6 +117,7 @@ public Q_SLOTS:
       selection_item->selected_facets.insert(*it);
     }
     selection_item->changed_with_poly_item();
+    selection_item->invalidateOpenGLBuffers();
     QApplication::restoreOverrideCursor();
   }