diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index ffaba7a73f0..e5ea9277626 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -373,7 +373,7 @@
         Used to disable all interrupts.
       </li>
       <li>
-        <code>void irqrestore(irqstate_t flags)<code>:
+        <code>void irqrestore(irqstate_t flags)</code>:
         Used to restore interrupt enables to the same state as before <code>irqsave()</code> was called.
       </li>
     </ul>