diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index eff2c682bae..222538416be 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -67,6 +67,7 @@ require_once 'filefunc.inc.php';
  */
 '
 @phan-var-force ?string $dolibarr_main_db_prefix
+@phan-var-force ?string $dolibarr_main_db_collation
 @phan-var-force ?string $dolibarr_main_db_encryption
 @phan-var-force ?string $dolibarr_main_db_cryptkey
 @phan-var-force ?string $dolibarr_main_limit_users