Tweaked nav
diff --git a/user_guide/libraries/calendar.html b/user_guide/libraries/calendar.html
index f166cf8..941ebf5 100644
--- a/user_guide/libraries/calendar.html
+++ b/user_guide/libraries/calendar.html
@@ -236,7 +236,7 @@
 
 <div id="footer">
 <p>
-Previous Topic:&nbsp;&nbsp;<a href="benchmark.html">Benchmarking Class</a>
+Previous Topic:&nbsp;&nbsp;<a href="cart.html">Cart Class</a>
 &nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
 <a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
 <a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;