diff --git a/Convex_hull_3/include/CGAL/Vertex_to_point_traits_adapter_3.h b/Convex_hull_3/include/CGAL/Vertex_to_point_traits_adapter_3.h
index 5d0ab8ba5df..a31e060933f 100644
--- a/Convex_hull_3/include/CGAL/Vertex_to_point_traits_adapter_3.h
+++ b/Convex_hull_3/include/CGAL/Vertex_to_point_traits_adapter_3.h
@@ -21,6 +21,9 @@
 
 #ifndef CGAL_VERTEX_TO_POINT_TRAITS_ADAPTER_3_H
 #define CGAL_VERTEX_TO_POINT_TRAITS_ADAPTER_3_H
+
+#include <CGAL/license/Convex_hull_3.h>
+
 #include <boost/call_traits.hpp>
 #include <CGAL/property_map.h>
 #include <CGAL/tags.h>