diff --git a/Operations_on_polyhedra/include/CGAL/intersection_of_Polyhedra_3_refinement_visitor.h b/Operations_on_polyhedra/include/CGAL/intersection_of_Polyhedra_3_refinement_visitor.h
index 9332d6d6dcc..7d049f6a7b8 100644
--- a/Operations_on_polyhedra/include/CGAL/intersection_of_Polyhedra_3_refinement_visitor.h
+++ b/Operations_on_polyhedra/include/CGAL/intersection_of_Polyhedra_3_refinement_visitor.h
@@ -22,7 +22,7 @@
 #define CGAL_INTERSECTION_OF_POLYHEDRA_3_REFINEMENT_VISITOR_H
 
 #include <CGAL/intersection_of_Polyhedra_3.h>
-#include <CGAL/internal/corefinement/Polyhedron_subset_extraction.h>
+#include <CGAL/Polygon_mesh_processing/Connected_components.h>
 #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
 #include <CGAL/Constrained_Delaunay_triangulation_2.h>
 #include <CGAL/Triangulation_vertex_base_with_info_2.h>
diff --git a/Operations_on_polyhedra/include/CGAL/internal/corefinement/Polyhedron_subset_extraction.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/Connected_components.h
similarity index 100%
rename from Operations_on_polyhedra/include/CGAL/internal/corefinement/Polyhedron_subset_extraction.h
rename to Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/Connected_components.h
diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
index 68fb6316288..d168a3276bf 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo_join_and_split_polyhedra_plugin.cpp
@@ -11,7 +11,7 @@
 #include "Polyhedron_demo_plugin_interface.h"
 
 #include <CGAL/Polyhedron_copy_3.h>
-#include <CGAL/internal/corefinement/Polyhedron_subset_extraction.h>
+#include <CGAL/Polygon_mesh_processing/Connected_components.h>
 
 #include <boost/foreach.hpp>
 #include <boost/function_output_iterator.hpp>