diff --git a/Documentation/NuttxUserGuide.html b/Documentation/NuttxUserGuide.html
index 557d59036eb..7d37b73ef18 100644
--- a/Documentation/NuttxUserGuide.html
+++ b/Documentation/NuttxUserGuide.html
@@ -5772,7 +5772,7 @@ interface of the same name.
   <li><a href="#unsetenv">2.10.5 <code>unsetenv</code></a></li>
 </ul>
 <p><b>Disabling Environment Variable Support</b>.
-  All support for environment variables can be disabled by setting <code>CONFIG_DISABLE_ENVIRONMENT</code>
+  All support for environment variables can be disabled by setting <code>CONFIG_DISABLE_ENVIRON</code>
   in the board configuration file.
 </p>