diff --git a/errata.html b/errata.html
index 935a8da..d12a11a 100644
--- a/errata.html
+++ b/errata.html
@@ -245,5 +245,10 @@ pre {
     (Thanks to Joe Tsai, 2015-11-18.  Corrected in the third printing.)
   </p>
 
+  <p>
+    <b>p.366, Exercise 13.3</b>: For <code>bzip2.writer</code>, read <code>bzip.writer</code>.
+    (Thanks to Yoshiki Shibata, 2015-12-20.)
+  </p>
+
 </body>
 </html>