diff --git a/Documentation/doc/Documentation/dependencies b/Documentation/doc/Documentation/dependencies
index 86d7b5629cb..9704e679150 100644
--- a/Documentation/doc/Documentation/dependencies
+++ b/Documentation/doc/Documentation/dependencies
@@ -11,6 +11,7 @@ Matrix_search
 Box_intersection_d
 CGAL_ipelets
 Circulator
+Cone_spanners_2
 Convex_decomposition_3
 Convex_hull_2
 Convex_hull_3