diff --git a/Documentation/NuttX.html b/Documentation/NuttX.html
index 23a9421525..83716155a6 100644
--- a/Documentation/NuttX.html
+++ b/Documentation/NuttX.html
@@ -891,7 +891,7 @@
   <td><br></td>
   <td>
     <p>
-      <li>Device-dependent USB class drivers available for USB mass storage, HID keyboard, and HID mouse.</li>
+      <li>Device-dependent USB class drivers available for USB mass storage, CDC/ACM serial, HID keyboard, and HID mouse.</li>
     </p>
 </tr>
 <tr>