diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index b39d5216218fabe39c2d815d36a31585be01b137..a9bae9b8e7262e2568c773cba43dba5feb3d5b35 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -84,7 +84,7 @@ if (! empty($dolibarr_main_document_root_alt))
 			print "\"/extensions\"<br>\n";
 			print "\"/extensions1,/extensions2,...\"<br>\n";
 			print "\"/../extensions\"<br>\n";
-			print "\"/custom\"<br>\n";
+			print "\"/dolibarr/custom\"<br>\n";
 			exit;
 		}
 		$conf->file->dol_url_root['alt'.($i++)]=(string) $value;