diff --git a/reference/dom/domnode.xml b/reference/dom/domnode.xml
index cb08e9cae4..682d929a41 100644
--- a/reference/dom/domnode.xml
+++ b/reference/dom/domnode.xml
@@ -146,7 +146,13 @@
     <varlistentry xml:id="domnode.props.nodevalue">
      <term><varname>nodeValue</varname></term>
      <listitem>
-      <para>The value of this node, depending on its type</para>
+      <para>
+       The value of this node, depending on its type.
+       Contrary to the W3C specification, the node value of
+       <classname>DOMElement</classname> nodes is equal to <link
+       linkend="domnode.props.textcontent">DOMNode::textContent</link> instead
+       of &null;.
+      </para>
      </listitem>
     </varlistentry>
     <varlistentry xml:id="domnode.props.nodetype">