diff --git a/htdocs/install/mysql/migration/12.0.0-13.0.0.sql b/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
index e0fd93aa005..c8567cbee4b 100644
--- a/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
+++ b/htdocs/install/mysql/migration/12.0.0-13.0.0.sql
@@ -58,6 +58,9 @@ ALTER TABLE llx_mrp_mo_extrafields ADD INDEX idx_mrp_mo_fk_object(fk_object);
 
 
 -- For v13
+-- members
+ALTER TABLE llx_adherent ADD COLUMN ref varchar(30) NOT NULL AFTER rowid;
+UPDATE llx_adherent SET ref=rowid;
 
 ALTER TABLE llx_bom_bom ADD COLUMN bomtype integer DEFAULT 0;