diff --git a/language/types/null.xml b/language/types/null.xml
index 1083a08eff..3e06a6ff23 100644
--- a/language/types/null.xml
+++ b/language/types/null.xml
@@ -5,7 +5,7 @@
   
  <para>
   The special &null; value represents a variable with no value. &null; is the
-  only possible value of type <type>NULL</type>.
+  only possible value of type <type>null</type>.
  </para>
 
  <para>
@@ -56,7 +56,7 @@ $var = NULL;
  </sect2>
  
  <sect2 xml:id="language.types.null.casting">
-  <title>Casting to <literal>NULL</literal></title>
+  <title>Casting to &null;</title>
 
   <para>
    Casting a variable to <type>null</type> using <literal>(unset) $var</literal>