diff --git a/Documentation/NXGraphicsSubsystem.html b/Documentation/NXGraphicsSubsystem.html
index 9a4080668b1..df9234f17c8 100644
--- a/Documentation/NXGraphicsSubsystem.html
+++ b/Documentation/NXGraphicsSubsystem.html
@@ -408,6 +408,7 @@
 <p>
   NxConsole is a write-only character device (not shown) that is built on top of an NX window.
   This character device can be used to provide <code>stdout</code> and <code>stderr</code> and, hence, can provide the output side of NuttX console.
+  NxConsole is only available when the multi-user NX implementation is selected (<code>CONFIG_NX_MULTIUSER</code>).
 </p>
 
 <table width ="100%">