diff --git a/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_precomputed_shapes_example.cpp b/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_precomputed_shapes_example.cpp
index 350302b12ef..75ce537e25c 100644
--- a/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_precomputed_shapes_example.cpp
+++ b/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_precomputed_shapes_example.cpp
@@ -61,10 +61,10 @@ int main(const int argc, const char** argv) {
   std::vector<Point_3> input_vertices;
   std::vector< std::vector<std::size_t> > input_faces;
 
-  if (CGAL::read_OFF(input_file_off, input_vertices, input_faces)) {
+  if (CGAL::IO::read_OFF(input_file_off, input_vertices, input_faces)) {
     std::cout << "* reading the OFF file: " << input_filename << "!" << std::endl;
     input_file_off.close();
-  } else if (CGAL::read_PLY(input_file_ply, input_vertices, input_faces)) {
+  } else if (CGAL::IO::read_PLY(input_file_ply, input_vertices, input_faces)) {
     std::cout << "* reading the PLY file: " << input_filename << "!" << std::endl;
     input_file_ply.close();
   } else {
diff --git a/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_reconstruction_example.cpp b/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_reconstruction_example.cpp
index 4a41de34aa4..63c8d19bc7e 100644
--- a/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_reconstruction_example.cpp
+++ b/Kinetic_shape_reconstruction/examples/Kinetic_shape_reconstruction/kinetic_reconstruction_example.cpp
@@ -180,7 +180,7 @@ int main(const int argc, const char** argv) {
   output_filename = "partition-faces.ply";
   std::ofstream output_file_faces(output_filename);
   output_file_faces.precision(20);
-  if (!CGAL::write_PLY(output_file_faces, all_vertices, all_faces)) {
+  if (!CGAL::IO::write_PLY(output_file_faces, all_vertices, all_faces)) {
     std::cerr << "ERROR: can't write to the file " << output_filename << "!" << std::endl;
     return EXIT_FAILURE;
   }
@@ -191,7 +191,7 @@ int main(const int argc, const char** argv) {
   output_filename = "reconstructed-model.ply";
   std::ofstream output_file_model(output_filename);
   output_file_model.precision(20);
-  if (!CGAL::write_PLY(output_file_model, output_vertices, output_faces)) {
+  if (!CGAL::IO::write_PLY(output_file_model, output_vertices, output_faces)) {
     std::cerr << "ERROR: can't write to the file " << output_filename << "!" << std::endl;
     return EXIT_FAILURE;
   }
diff --git a/Kinetic_shape_reconstruction/include/CGAL/KSR/debug.h b/Kinetic_shape_reconstruction/include/CGAL/KSR/debug.h
index db5cd7c2919..54b5f3a78f5 100644
--- a/Kinetic_shape_reconstruction/include/CGAL/KSR/debug.h
+++ b/Kinetic_shape_reconstruction/include/CGAL/KSR/debug.h
@@ -138,7 +138,7 @@ void dump_2d_surface_mesh(
   const std::string filename = (tag != std::string() ? tag + "-" : "") + "polygons.ply";
   std::ofstream out(filename);
   out.precision(20);
-  CGAL::write_PLY(out, mesh);
+  CGAL::IO::write_PLY(out, mesh);
   out.close();
 }
 
@@ -211,7 +211,7 @@ void dump_polygons(const DS& data, const std::string tag = std::string()) {
   const std::string filename = (tag != std::string() ? tag + "-" : "") + "polygons.ply";
   std::ofstream out(filename);
   out.precision(20);
-  CGAL::write_PLY(out, mesh);
+  CGAL::IO::write_PLY(out, mesh);
   out.close();
 
 #if false
@@ -779,7 +779,7 @@ void dump_cdt(
   file_name += "support-cdt-" + std::to_string(sp_idx) + ".ply";
   std::ofstream out(file_name);
   out.precision(20);
-  CGAL::write_PLY(out, mesh);
+  CGAL::IO::write_PLY(out, mesh);
   out.close();
 }
 
diff --git a/Kinetic_shape_reconstruction/test/Kinetic_shape_reconstruction/kinetic_3d_test_all.cpp b/Kinetic_shape_reconstruction/test/Kinetic_shape_reconstruction/kinetic_3d_test_all.cpp
index 10bc368b680..e93bc252514 100644
--- a/Kinetic_shape_reconstruction/test/Kinetic_shape_reconstruction/kinetic_3d_test_all.cpp
+++ b/Kinetic_shape_reconstruction/test/Kinetic_shape_reconstruction/kinetic_3d_test_all.cpp
@@ -57,7 +57,7 @@ bool run_test(
   std::ifstream input_file(input_filename);
   std::vector<Point_3> input_vertices;
   std::vector< std::vector<std::size_t> > input_faces;
-  const bool is_input_success = CGAL::read_OFF(input_file, input_vertices, input_faces);
+  const bool is_input_success = CGAL::IO::read_OFF(input_file, input_vertices, input_faces);
   assert(is_input_success);
   if (!is_input_success) return false;
   std::vector<double> times;