diff --git a/Convex_hull_3/examples/Convex_hull_3/quickhull_indexed_triangle_set_3.cpp b/Convex_hull_3/examples/Convex_hull_3/quickhull_indexed_triangle_set_3.cpp
index 1d524c31ebb..256e9009a88 100644
--- a/Convex_hull_3/examples/Convex_hull_3/quickhull_indexed_triangle_set_3.cpp
+++ b/Convex_hull_3/examples/Convex_hull_3/quickhull_indexed_triangle_set_3.cpp
@@ -1,5 +1,4 @@
 #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
-#include <CGAL/Indexed_triangle_set.h>
 #include <CGAL/convex_hull_3.h>
 
 #include <vector>
@@ -24,7 +23,7 @@ int main(int argc, char* argv[])
     points.push_back(p);
   }
 
-  
+
   CGAL::convex_hull_3(points.begin(), points.end(), vertices, faces);
 
   std::cout << vertices.size() << "  " << faces.size() << std::endl;
diff --git a/Convex_hull_3/include/CGAL/Indexed_triangle_set.h b/Convex_hull_3/include/CGAL/Convex_hull_3/internal/Indexed_triangle_set.h
similarity index 100%
rename from Convex_hull_3/include/CGAL/Indexed_triangle_set.h
rename to Convex_hull_3/include/CGAL/Convex_hull_3/internal/Indexed_triangle_set.h
diff --git a/Convex_hull_3/include/CGAL/convex_hull_3.h b/Convex_hull_3/include/CGAL/convex_hull_3.h
index 73e39b39327..681dcfe52ea 100644
--- a/Convex_hull_3/include/CGAL/convex_hull_3.h
+++ b/Convex_hull_3/include/CGAL/convex_hull_3.h
@@ -31,6 +31,7 @@
 #include <CGAL/Triangulation_vertex_base_with_info_2.h>
 #include <CGAL/Cartesian_converter.h>
 #include <CGAL/Simple_cartesian.h>
+#include <CGAL/Convex_hull_3/internal/Indexed_triangle_set.h>
 
 #include <CGAL/Number_types/internal/Exact_type_selector.h>
 #include <CGAL/boost/graph/copy_face_graph.h>