From b2c6cec8af7bac6f007d7a19384008bf3c49fa8a Mon Sep 17 00:00:00 2001
From: Sebastien Loriot <sloriot.ml@gmail.com>
Date: Tue, 12 Sep 2023 11:08:21 +0200
Subject: [PATCH] A missing ref

Co-authored-by: Andreas Fabri <andreas.fabri@geometryfactory.com>
---
 Mesh_3/include/CGAL/Polyhedral_complex_mesh_domain_3.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Mesh_3/include/CGAL/Polyhedral_complex_mesh_domain_3.h b/Mesh_3/include/CGAL/Polyhedral_complex_mesh_domain_3.h
index 3c53b56f401..835940944c7 100644
--- a/Mesh_3/include/CGAL/Polyhedral_complex_mesh_domain_3.h
+++ b/Mesh_3/include/CGAL/Polyhedral_complex_mesh_domain_3.h
@@ -525,7 +525,7 @@ public:
     }
 #define CGAL_USE_ALL_INTERSECTIONS 0
 #if CGAL_USE_ALL_INTERSECTIONS
-    boost::optional<AABB_primitive_id> shoot_a_ray_2(const Ray_3 ray) const {
+    boost::optional<AABB_primitive_id> shoot_a_ray_2(const Ray_3& ray) const {
       const Point_3& p = ray.source();
       typedef typename AABB_tree::
         template Intersection_and_primitive_id<Ray_3>::Type Inter_and_prim;