diff --git a/language/types/null.xml b/language/types/null.xml
index 5b7b91cb8d..1083a08eff 100644
--- a/language/types/null.xml
+++ b/language/types/null.xml
@@ -59,7 +59,7 @@ $var = NULL;
   <title>Casting to <literal>NULL</literal></title>
 
   <para>
-   Casting a variable to <type>null</type> using <literal>unset($var)</literal>
+   Casting a variable to <type>null</type> using <literal>(unset) $var</literal>
    will <emphasis>not</emphasis> remove the variable or unset its value.
    It will only return a &null; value.
   </para>