diff --git a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3/internal/Periodic_3_triangulation_filtered_traits_3.h b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3/internal/Periodic_3_triangulation_filtered_traits_3.h
index 7867ea9597bd..0254bf652b95 100644
--- a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3/internal/Periodic_3_triangulation_filtered_traits_3.h
+++ b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3/internal/Periodic_3_triangulation_filtered_traits_3.h
@@ -82,8 +82,6 @@ class Periodic_3_triangulation_filtered_traits_base_3
 
   virtual ~Periodic_3_triangulation_filtered_traits_base_3() { }
 
-  Periodic_3_triangulation_filtered_traits_base_3(const& Periodic_3_triangulation_filtered_traits_base_3) = delete;
-
   Periodic_3_triangulation_filtered_traits_base_3(const Iso_cuboid_3& domain,
                                                   const Kernel& k)
     :
@@ -162,16 +160,11 @@ class Periodic_3_triangulation_filtered_traits_3<K_, Off_, false>
   : public Periodic_3_triangulation_filtered_traits_base_3<K_, Off_>
 {
   typedef Periodic_3_triangulation_filtered_traits_base_3<K_, Off_> Base;
-  typedef Periodic_3_triangulation_filtered_traits_3<K_, Off_, false> Self;
 
 public:
   typedef K_                                                        Kernel;
   typedef typename Kernel::Iso_cuboid_3                             Iso_cuboid_3;
 
-  Periodic_3_triangulation_filtered_traits_3& operator=(const Self&) = delete;
-
-  Periodic_3_triangulation_filtered_traits_3(const& Self) = delete;
-
   Periodic_3_triangulation_filtered_traits_3(const Iso_cuboid_3& domain,
                                              const Kernel& k)
     : Base(domain, k)
@@ -188,7 +181,6 @@ class Periodic_3_triangulation_filtered_traits_3<K_, Off_, true>
   typedef K_                                                              Kernel;
   typedef typename Kernel::Iso_cuboid_3                                   Iso_cuboid_3;
 
-
   Periodic_3_triangulation_filtered_traits_3(const Iso_cuboid_3& domain,
                                              const Kernel& k)
     : Base(domain, k)