diff --git a/htdocs/install/mysql/migration/3.9.0-4.0.0.sql b/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
index f1c94f346cf..8880f3fae97 100644
--- a/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
+++ b/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
@@ -34,6 +34,7 @@ ALTER TABLE llx_product_customer_price ADD COLUMN localtax1_type varchar(10)  NO
 ALTER TABLE llx_product_customer_price ADD COLUMN localtax2_type varchar(10)  NOT NULL DEFAULT '0' after localtax2_tx; 
 ALTER TABLE llx_product_customer_price_log ADD COLUMN localtax1_type varchar(10)  NOT NULL DEFAULT '0' after localtax1_tx; 
 ALTER TABLE llx_product_customer_price_log ADD COLUMN localtax2_type varchar(10)  NOT NULL DEFAULT '0' after localtax2_tx; 
+ALTER TABLE llx_supplier_proposaldet CHANGE COLUMN fk_askpricesupplier fk_supplier_proposal integer NOT NULL;
 
 ALTER TABLE llx_opensurvey_sondage ADD COLUMN status integer DEFAULT 1 after date_fin;