diff --git a/htdocs/core/db/mysqli.class.php b/htdocs/core/db/mysqli.class.php
index aaeaaf4c910..ff38a549938 100644
--- a/htdocs/core/db/mysqli.class.php
+++ b/htdocs/core/db/mysqli.class.php
@@ -112,7 +112,7 @@ class DoliDBMysqli extends DoliDB
 				$this->ok = true;
 
 				// If client is old latin, we force utf8
-				$clientmustbe = empty($conf->db->dolibarr_main_db_character_set) ? 'utf8' : $conf->db->dolibarr_main_db_character_set;
+				$clientmustbe = empty($conf->db->character_set) ? 'utf8' : $conf->db->db_character_set;
 				if (preg_match('/latin1/', $clientmustbe)) {
 					$clientmustbe = 'utf8';
 				}