diff --git a/mysql/migration/2.6.0-2.7.0.sql b/mysql/migration/2.6.0-2.7.0.sql
index 89a2a5f216e..943e9b4cd91 100644
--- a/mysql/migration/2.6.0-2.7.0.sql
+++ b/mysql/migration/2.6.0-2.7.0.sql
@@ -240,4 +240,5 @@ insert into llx_c_departements ( code_departement, fk_region, cheflieu, tncc, nc
 alter table llx_facture_fourn_det add column ref               varchar(50) after fk_product;
 alter table llx_facture_fourn_det add column label             varchar(255) after ref;
 
-alter table llx_societe_rib modify column iban_prefix varchar(50);
\ No newline at end of file
+alter table llx_societe_rib modify column iban_prefix varchar(34);
+alter table llx_bank_account modify column iban_prefix varchar(34);