diff --git a/errata.html b/errata.html
index 713dd36..8c4e15b 100644
--- a/errata.html
+++ b/errata.html
@@ -195,6 +195,12 @@ pre {
     match the earlier commands.
     (Thanks to Kiyoshi Kamishima, 2016-01-08.)
   </p>
+
+  <p>
+    <b>p.235, ¶3</b>: <code>makeThumnails</code> refers to the second draft
+    of the function, <code>makeThumnails2</code>.
+    (Thanks to 有賀功 Isao Aruga, 2016-07-13.)
+  </p>
  
   <p>
     <b>p.272, ¶3</b>: for "the request body", read "the response body".