diff --git a/_posts/2009-04-01-GhostNet.md b/_posts/2009-04-01-GhostNet.md
index 7aa46afe3..e20131680 100644
--- a/_posts/2009-04-01-GhostNet.md
+++ b/_posts/2009-04-01-GhostNet.md
@@ -55,9 +55,7 @@ Maurice Oustache
 <a href="http://www.linkedin.com/in/mauriceoustache">LinkedIn</a>
 </p>
 
-<p>
-
-```
+<pre><code>
 // Copyright (c) 1999  Utrecht University (The Netherlands),
 // ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
 // INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
@@ -77,28 +75,26 @@ Maurice Oustache
 //
 // $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/trunk/Kernel_23/include/CGAL/basic.h $
 // $Id: basic.h 28567 2006-02-16 14:30:13Z lsaboret $
-// 
+//
 //
 // Author(s)     : Andreas Fabri
-//                 
- 
+//
+
 #ifndef CGAL_BASIC_H
 #define CGAL_BASIC_H
 
-#include <CGAL/config.h>
+#include &ltCGAL/config.h&gt;
 
-#include <iostream>
-#include <cstdlib>
+#include &ltiostream&gt;
+#include &ltcstdlib&gt;
 
-#include <CGAL/assertions.h>
+#include &ltCGAL/assertions.h&gt;
 #error "April 1st joke bug"
-#include <CGAL/tags.h>
-#include <CGAL/number_type_basic.h>
-#include <CGAL/IO/io.h>
-#include <CGAL/kernel_basic.h>
-
+#include &ltCGAL/tags.h&gt;
+#include &ltCGAL/number_type_basic.h&gt;
+#include &ltCGAL/IO/io.h&gt;
+#include &ltCGAL/kernel_basic.h&gt;
 
 #endif // CGAL_BASIC_H
-```
-
-</p>
+</code>
+</pre>