diff --git a/language/types.xml b/language/types.xml
index 5753d64cb4..ee4baa22c6 100644
--- a/language/types.xml
+++ b/language/types.xml
@@ -1,5 +1,5 @@
 <?xml encoding="iso-8859-1"?>
-<!-- $Revision: 1.52 $ -->
+<!-- $Revision: 1.53 $ -->
  <chapter id="language.types">
   <title>Types</title>
 
@@ -72,7 +72,7 @@
 
     <listitem>
      <simpara>
-      <link linkend="language.types.null">&null;</link>
+      <link linkend="language.types.null">NULL</link>
      </simpara>
     </listitem>
 
@@ -219,7 +219,7 @@ if ($show_separators) {
         </listitem>
         <listitem>
          <simpara>the special value <link linkend="language.types.null"
-            >&null;</link> 
+            >NULL</link> 
          </simpara>
         </listitem>
        </itemizedlist>
@@ -1713,11 +1713,12 @@ $bar->do_foo();
   </sect1>
     
   <sect1 id="language.types.null">
-   <title>&null;</title>
+   <title>NULL</title>
     
    <para>
     The special &null; value represents 
-    that a variable has no value.
+    that a variable has no value. &null; is the only possible value of type
+    <type>NULL</type>.
    </para>
     <note>
      <simpara>