1 files changed, 2 insertions, 2 deletions

diff --git a/doc/ext_ffi_tutorial.html b/doc/ext_ffi_tutorial.html
index ae376b1f..6ba76dc2 100644
--- a/doc/ext_ffi_tutorial.html
+++ b/doc/ext_ffi_tutorial.html
@@ -214,7 +214,7 @@ a fascinating best-selling game is left as an exercise for the reader.
 <h2 id="zlib">Accessing the zlib Compression Library</h2>
 <p>
 The following code shows how to access the <a
-href="https://zlib.net/">zlib</a> compression library from Lua code.
+href="https://zlib.net/"><span class="ext">&raquo;</span>&nbsp;zlib</a> compression library from Lua code.
 We'll define two convenience wrapper functions that take a string and
 compress or uncompress it to another string:
 </p>
@@ -297,7 +297,7 @@ comes pre-installed. Since <tt>ffi.load()</tt> automatically adds any
 missing standard prefixes/suffixes, we can simply load the
 <tt>"z"</tt> library. On Windows it's named <tt>zlib1.dll</tt> and
 you'll have to download it first from the
-<a href="https://zlib.net/">zlib site</a>. The check for
+<a href="https://zlib.net/"><span class="ext">&raquo;</span>&nbsp;zlib site</a>. The check for
 <tt>ffi.os</tt> makes sure we pass the right name to
 <tt>ffi.load()</tt>.
 </p>