diff --git a/toroid.html b/toroid.html
index 2eb2fdc..529686a 100644
--- a/toroid.html
+++ b/toroid.html
@@ -131,6 +131,8 @@
             </ul>
             <br>
             <b><u>Change history:</u></b><br>
+            <b>[3-Nov-21]</b> <br>
+            * Disabled PI support due to bugs that need to be fixed.<br>
             <b>[2-Nov-21]</b> <br>
             * Release 0.9a - Major code refactor to support Powdered Iron toroids.<br>
             <b>[26-Oct-21]</b> <br>