diff --git a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_E08_tree.h b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_E08_tree.h
index a2caaa91aaf..50ae06acee9 100644
--- a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_E08_tree.h
+++ b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_E08_tree.h
@@ -436,6 +436,9 @@ public:
   friend class CGAL::internal::Bitstream_descartes_E08_tree<TRAITS>;
   friend class CGAL::internal::Bitstream_descartes_E08_tree_rep<TRAITS>;
 
+  Bitstream_descartes_E08_node(const Self&) = default;
+  Self& operator= (const Self&) = delete;
+
 private:
     // "node data" (set individually in subdivision)
     Integer lower_num_, upper_num_; // TODO use lower_num_, width_num_ instead
@@ -466,9 +469,6 @@ private:
         log_eps_          = n.log_eps_;
         log_C_eps_        = n.log_C_eps_;
     }
-
-    Bitstream_descartes_E08_node(const Self&) = delete;
-    Self& operator= (const Self&) = delete;
 }; // struct Bitstream_descartes_E08_node
 
 
diff --git a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree.h b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree.h
index 6ba6d3d47a2..b86439473dd 100644
--- a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree.h
+++ b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree.h
@@ -524,6 +524,9 @@ public:
 
     friend class internal::Bitstream_descartes_rndl_tree<TRAITS>;
     friend class internal::Bitstream_descartes_rndl_tree_rep<TRAITS>;
+    
+    Bitstream_descartes_rndl_node(const Self&) = default;
+    Self& operator= (const Self&) = delete;
 
 private:
     // "node data" (set individually in subdivision)
@@ -557,9 +560,6 @@ private:
         log_eps_       = n.log_eps_;
         log_C_eps_     = n.log_C_eps_;
     }
-
-    Bitstream_descartes_rndl_node(const Self&)=delete;
-    Self& operator= (const Self&)=delete;
 }; // struct Bitstream_descartes_rndl_node