diff --git a/ecrire/inc/valider_xml.php b/ecrire/inc/valider_xml.php
index 354de2fae6360a872db82fab2640d75315e83320..5cec999ea72ccaaac42fe5011ff9bac9683cfc59 100644
--- a/ecrire/inc/valider_xml.php
+++ b/ecrire/inc/valider_xml.php
@@ -30,6 +30,7 @@ class DTC {
 	var	$regles = array();
 }
 
+// http://doc.spip.org/@analyser_doctype
 function analyser_doctype($data)
 {
 	if (!preg_match(_REGEXP_DOCTYPE, $data, $r))