diff --git a/user_guide/libraries/trackback.html b/user_guide/libraries/trackback.html
index 28ee43e..f01b3a5 100644
--- a/user_guide/libraries/trackback.html
+++ b/user_guide/libraries/trackback.html
@@ -8,7 +8,7 @@
 <link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
 
 <script type="text/javascript" src="../nav/nav.js"></script>
-<script type="text/javascript" src="../scripts/prototype.lite.js"></script>
+<script type="text/javascript" src="../nav/prototype.lite.js"></script>
 <script type="text/javascript" src="../nav/moo.fx.js"></script>
 <script type="text/javascript">
 window.onload = function() {