diff --git a/index.html b/index.html
index b902d80c..7acce356 100644
--- a/index.html
+++ b/index.html
@@ -86,7 +86,7 @@ <h2>PCT Book</h2>
 
 <h2>Parrot Developer's Guide: PIR (draft)</h2>
 
-<ul><li><a href="book.html">Parrot Developer's Guide: PIR (draft)</a></li>
+<ul><li><a href="./html/book.html">Parrot Developer's Guide: PIR (draft)</a></li>
 </ul>
 
 <h2>Development Languages</h2>