diff --git a/htdocs/core/lib/website.lib.php b/htdocs/core/lib/website.lib.php
index cbd68e69502..90ceddd8bcc 100644
--- a/htdocs/core/lib/website.lib.php
+++ b/htdocs/core/lib/website.lib.php
@@ -286,7 +286,7 @@ function dolWebsiteOutput($content, $contenttype = 'html', $containerid = 0)
 	global $db, $langs, $conf, $user;
 	global $dolibarr_main_url_root, $dolibarr_main_data_root;
 	global $website;
-	global $includehtmlcontentopened;	// $includehtmlcontentopened is the level of includes (start at 1)
+	global $includehtmlcontentopened;	// $includehtmlcontentopened is the level of includes (start at 0 for main page, 1 for first level include, ...)
 	'@phan-var-force Website $website';
 
 	$nbrep = 0;