diff --git a/Convex_hull_2/doc_tex/Convex_hull_2_ref/convex_hull_2.tex b/Convex_hull_2/doc_tex/Convex_hull_2_ref/convex_hull_2.tex
index 961548e6267..7dc84257a6f 100644
--- a/Convex_hull_2/doc_tex/Convex_hull_2_ref/convex_hull_2.tex
+++ b/Convex_hull_2/doc_tex/Convex_hull_2_ref/convex_hull_2.tex
@@ -45,6 +45,7 @@ the type \ccc{InputIterator::value_type} is defined.
             functions that return instances of these types:
             \begin{itemize}
                 \item \ccc{Traits::Point_2},
+                \item \ccc{Traits::Less_signed_distance_to_line_2},
 		\item \ccc{Traits::Equal_2},
                 \item \ccc{Traits::Less_xy_2}, 
                 \item \ccc{Traits::Less_yx_2},