From 7e6d750af986cb287af5b69deda461e1153bb36a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Wed, 5 Oct 2022 18:26:08 +0200
Subject: [PATCH] add missing const

---
 BGL/include/CGAL/boost/graph/internal/helpers.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BGL/include/CGAL/boost/graph/internal/helpers.h b/BGL/include/CGAL/boost/graph/internal/helpers.h
index b0a4ab885ae..4da0e59a63c 100644
--- a/BGL/include/CGAL/boost/graph/internal/helpers.h
+++ b/BGL/include/CGAL/boost/graph/internal/helpers.h
@@ -168,7 +168,7 @@ exact_num_faces(const Graph& g)
 template<typename Graph>
 bool
 is_isolated(typename boost::graph_traits<Graph>::vertex_descriptor v,
-            Graph& g)
+            const Graph& g)
 {
   return halfedge(v, g) == boost::graph_traits<Graph>::null_halfedge();
 }