diff --git a/Minkowski_sum_2/include/CGAL/minkowski_sum_2.h b/Minkowski_sum_2/include/CGAL/minkowski_sum_2.h
index a39e0984e09..5a730c6f4eb 100644
--- a/Minkowski_sum_2/include/CGAL/minkowski_sum_2.h
+++ b/Minkowski_sum_2/include/CGAL/minkowski_sum_2.h
@@ -38,6 +38,7 @@ namespace CGAL {
  * \param pgn2 The second polygon.
  * \return The resulting polygon with holes, representing the sum.
  */
+
 template <class Kernel, class Container>
 Polygon_with_holes_2<Kernel,Container>
 minkowski_sum_2 (const Polygon_2<Kernel,Container>& pgn1,