diff --git a/Minkowski_sum_2/test/Minkowski_sum_2/read_polygon.h b/Minkowski_sum_2/test/Minkowski_sum_2/read_polygon.h
index 1d7f98b4d2d..52e75d72157 100644
--- a/Minkowski_sum_2/test/Minkowski_sum_2/read_polygon.h
+++ b/Minkowski_sum_2/test/Minkowski_sum_2/read_polygon.h
@@ -14,43 +14,17 @@
 template <class Kernel>
 bool read_polygon (const char *filename, CGAL::Polygon_2<Kernel>& pgn)
 {
-  // Open the input file.
-  std::ifstream          ifile (filename);
-
-  if (! ifile.is_open())
-  {
-    std::cerr << "Failed to open <" << filename << ">." << std::endl;
-    return (false);
-  }
-
-  // Read the polygon.
-  int                                     n_vertices = 0;
-  typename Kernel::FT                     x, y;
-  std::list<typename Kernel::Point_2>     vertices;
-  int                                     k;
-
-  // Read the number of polygon vertices.
-  ifile >> n_vertices;
-
-  // Read the vertices.
-  for (k = 0; k < n_vertices; k++)
-  {
-    ifile >> x >> y;
-
-    vertices.push_back (typename Kernel::Point_2 (x, y));
-  }
-  ifile.close();
-
-  pgn = CGAL::Polygon_2<Kernel> (vertices.begin(), vertices.end());
+  std::ifstream ifile(filename);
+  ifile >> pgn;
 
   // Make sure the polygon is simple.
   if (! pgn.is_simple())
   {
     std::cerr << "Error - the polygon is not simple." << std::endl;
-    return (false);
+    return false;
   }
 
-  return (true);
+  return true;
 }
 
 template <class Kernel>