diff --git a/Nef_3/Minkowski/include/CGAL/Nef_3/Ray_hit_generator.h b/Nef_3/Minkowski/include/CGAL/Nef_3/Ray_hit_generator.h
index 59d4f3bd46f..b45169b39b6 100644
--- a/Nef_3/Minkowski/include/CGAL/Nef_3/Ray_hit_generator.h
+++ b/Nef_3/Minkowski/include/CGAL/Nef_3/Ray_hit_generator.h
@@ -107,6 +107,7 @@ class Ray_hit_generator : public Modifier_base<typename Nef_::SNC_and_PL> {
 #endif
       }
 
+      // TODO: that's too much
       pl->add_edge(svf);
       pl->add_edge(svb);