diff --git a/Installation/CHANGES.md b/Installation/CHANGES.md
index 78fc891eea6..0fcef24d83d 100644
--- a/Installation/CHANGES.md
+++ b/Installation/CHANGES.md
@@ -1,6 +1,7 @@
 Release History
 ===============
 
+
 Release 4.13
 ------------
 
@@ -36,6 +37,13 @@ Release date: September 2018
 -   Added a function to apply a transformation to a mesh : 
     - `CGAL::Polygon_mesh_processing::transform()`
 
+### CGAL and the Boost Graph Library (BGL)
+
+-   Add helper function `CGAL::is_valid_polygon_mesh` that checks the
+    validity of a polygon mesh using BGL functions.
+
+
+
 Release 4.12
 ------------
 
@@ -210,9 +218,6 @@ Release date: April 2018
 
 ### CGAL and the Boost Graph Library (BGL)
 
--   Add helper function `CGAL::is_valid_polygon_mesh` that checks the 
-    validity of a polygon mesh using BGL functions.
-
 -   Add helper function `CGAL::expand_face_selection_for_removal` that
     expands a face selection to avoid creating a non manifold mesh when
     removing the selected faces.