From aa2a87e538e51b119b615bb55df4036a9806d31f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mael=20Rouxel-Labb=C3=A9?=
 <mael.rouxel.labbe@geometryfactory.com>
Date: Wed, 3 May 2023 11:27:28 +0200
Subject: [PATCH] Add missing const

---
 .../include/CGAL/Polygon_mesh_processing/border.h               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
index 6f8c0cb9081..c9f8c2bf091 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/border.h
@@ -257,7 +257,7 @@ std::size_t border_size(typename boost::graph_traits<PolygonMesh>::halfedge_desc
   /// @todo It could make sense to also return the length of each cycle.
   /// @todo It should probably go into BGL package (like the rest of this file).
   template <typename PolygonMesh, typename OutputIterator>
-  OutputIterator extract_boundary_cycles(PolygonMesh& pm,
+  OutputIterator extract_boundary_cycles(const PolygonMesh& pm,
                                          OutputIterator out)
   {
     typedef typename boost::graph_traits<PolygonMesh>::halfedge_descriptor halfedge_descriptor;