diff --git a/Triangulation_3/doc/Triangulation_3/dependencies b/Triangulation_3/doc/Triangulation_3/dependencies
index 27dd89cd9c1..90cf16912e5 100644
--- a/Triangulation_3/doc/Triangulation_3/dependencies
+++ b/Triangulation_3/doc/Triangulation_3/dependencies
@@ -4,6 +4,7 @@ STL_Extension
 Algebraic_foundations
 Convex_hull_3
 Circulator
+Spatial_sorting
 Stream_support
 Triangulation_2
 TDS_3