diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index 9e5c8122a9..65f4820bf0 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -3246,7 +3246,7 @@ extern void up_ledoff(int led);
 <ul>
   <li>
     <p>
-      <b><code>include/nuttx/mtd.h</code></b>.
+      <b><code>include/nuttx/mtd/mtd.h</code></b>.
       All structures and APIs needed to work with MTD drivers are provided in this header file.
     </p>
   </li>