diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index ae777e696e0..3771d370d11 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -3369,8 +3369,7 @@ build
 <h2>Allow for architecture optimized implementations</h2>
 
 <p>
-  The architecture can provide optimized versions of the
-  following to improve system performance.
+  The architecture can provide optimized versions of the following to improve system performance.
 </p>
 
 <ul>
@@ -3380,6 +3379,12 @@ build
   <code>CONFIG_ARCH_STRNCPY</code>, <code>CONFIG_ARCH_STRLEN</code>, <code>CONFIG_ARCH_STRNLEN</code>,
   <code>CONFIG_ARCH_BZERO</code>
 </p>
+<p>
+  The architecture may provide custom versions of certain standard header files:
+</p>
+<p>
+  <code>CONFIG_ARCH_MATH_H</code>, <code>CONFIG_ARCH_STDBOOL_H</code>, <code>CONFIG_ARCH_STDINT_H</code>
+</p>
 </ul>
 
 <h2>Sizes of configurable things (0 disables)</h2>