diff --git a/Triangulation/doc/Triangulation/CGAL/Triangulation.h b/Triangulation/doc/Triangulation/CGAL/Triangulation.h
index a6fdbcdd3ea..14ab0eb2630 100644
--- a/Triangulation/doc/Triangulation/CGAL/Triangulation.h
+++ b/Triangulation/doc/Triangulation/CGAL/Triangulation.h
@@ -116,6 +116,9 @@ typedef TriangulationDataStructure::Face Face;
 /// non-mutable. They are convertible to the
 /// corresponding handles, thus the user can pass them directly as
 /// arguments to the functions.
+/// All handles are model of `LessThanComparable` and `Hashable`,
+/// that is they can be used as keys in containers such as `std::map`
+/// and `boost::unordered_map`.
 /// @{
 
 /*!