diff --git a/language/functions.xml b/language/functions.xml
index a1f80becd8..06978b3cd2 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -758,6 +758,13 @@ print $my_cart->getTotal(0.05) . "\n";
     </simpara>
    </note>
 
+   <note>
+    <simpara>
+     It was not possible to use <varname>$this</varname> from anonymous
+     function before PHP 5.4.0.
+    </simpara>
+   </note>
+
    <note>
     <simpara>
      It is possible to use <function>func_num_args</function>,