diff --git a/htdocs/install/mysql/migration/16.0.0-17.0.0.sql b/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
index e72fc1b8dcd..c1f96ca9d3e 100644
--- a/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
+++ b/htdocs/install/mysql/migration/16.0.0-17.0.0.sql
@@ -77,3 +77,5 @@ ALTER TABLE llx_recruitment_recruitmentcandidature ADD email_date datetime after
 ALTER TABLE llx_ticket ADD email_date datetime after email_msgid;
 
 INSERT INTO llx_const (name, entity, value, type, visible) VALUES ('MAIN_SECURITY_MAX_IMG_IN_HTML_CONTENT', 1, 1000, 'int', 0);
+
+ALTER TABLE `llx_adherent` ADD default_lang VARCHAR(6) NULL DEFAULT NULL AFTER datefin;