diff --git a/errata.html b/errata.html
index 5d26a95..bcebe3c 100644
--- a/errata.html
+++ b/errata.html
@@ -273,5 +273,11 @@ pre {
     (Thanks to Yoshiki Shibata, 2016-09-05.  Corrected in the fourth printing.)
   </p>
 
+  <p>
+    <b>p.371</b>: For "flag, <code>go tool -bench</code>", read
+    "flag, <code>go test -bench</code>", and similarly for the seven
+    following items.  (Thanks to Yutaka Kato, 2021-06-29.)
+  </p>
+
 </body>
 </html>