diff --git a/TDS_3/include/CGAL/Triangulation_data_structure_3.h b/TDS_3/include/CGAL/Triangulation_data_structure_3.h
index fbdd537dd6a..12c6a64432b 100644
--- a/TDS_3/include/CGAL/Triangulation_data_structure_3.h
+++ b/TDS_3/include/CGAL/Triangulation_data_structure_3.h
@@ -2324,7 +2324,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)) {
             os << V[it->vertex(j)];
             if ( j==3 )
-              os << std::endl;
+              os << '\n';
             else
               os << ' ';
           }
@@ -2340,7 +2340,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)){
             os << C[it->neighbor(j)];
             if(j==3)
-              os << std::endl;
+              os << '\n';
             else
               os <<  ' ';
           }
@@ -2354,7 +2354,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
     {
       size_type m = number_of_facets();
       if(is_ascii(os))
-        os << m << std::endl;
+        os << m << '\n';
       else
         write(os, m);
 
@@ -2366,7 +2366,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)) {
             os << V[(*it).first->vertex(j)];
             if ( j==2 )
-              os << std::endl;
+              os << '\n';
             else
               os <<  ' ';
           }
@@ -2383,7 +2383,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)){
             os << C[(*it).first->neighbor(j)];
             if(j==2)
-              os << std::endl;
+              os << '\n';
             else
               os <<  ' ';
           }
@@ -2398,7 +2398,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
     {
       size_type m = number_of_edges();
       if(is_ascii(os))
-        os << m << std::endl;
+        os << m << '\n';
       else
         write(os, m);
       // write the edges
@@ -2409,7 +2409,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)) {
             os << V[(*it).first->vertex(j)];
             if ( j==1 )
-              os << std::endl;
+              os << '\n';
             else
               os <<  ' ';
           }
@@ -2426,7 +2426,7 @@ print_cells(std::ostream& os, const Unique_hash_map<Vertex_handle, std::size_t>
           if(is_ascii(os)){
             os << C[(*it).first->neighbor(j)];
             if(j==1)
-              os << std::endl;
+              os << '\n';
             else
               os <<  ' ';
           }