diff --git a/Polygon_mesh_processing/include/CGAL/Rigid_triangle_mesh_collision_detection.h b/Polygon_mesh_processing/include/CGAL/Rigid_triangle_mesh_collision_detection.h
index 927fed1fe89..7c5c42997bc 100644
--- a/Polygon_mesh_processing/include/CGAL/Rigid_triangle_mesh_collision_detection.h
+++ b/Polygon_mesh_processing/include/CGAL/Rigid_triangle_mesh_collision_detection.h
@@ -176,6 +176,8 @@ public:
     : m_free_id(0)
   {}
 
+  Rigid_triangle_mesh_collision_detection(const Rigid_triangle_mesh_collision_detection&) = default;
+
   //! move constructor
   Rigid_triangle_mesh_collision_detection(Rigid_triangle_mesh_collision_detection&& other)
   {
@@ -191,6 +193,8 @@ public:
     }
   }
 
+  Rigid_triangle_mesh_collision_detection& operator=(Rigid_triangle_mesh_collision_detection& other) = default;
+
   //! move assignment operator
   Rigid_triangle_mesh_collision_detection& operator=(Rigid_triangle_mesh_collision_detection&& other)
   {