diff --git a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
index dfc1a08e553..6367dc9dd21 100644
--- a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
+++ b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
@@ -119,7 +119,8 @@ ALTER TABLE llx_societe CHANGE fk_entrepot fk_warehouse INTEGER DEFAULT NULL;
 --ALTER TABLE llx_societe ADD CONSTRAINT fk_propal_fk_warehouse FOREIGN KEY (fk_warehouse) REFERENCES llx_entrepot(rowid);
 ALTER TABLE llx_societe ADD INDEX idx_societe_warehouse(fk_warehouse);
 
-ALTER TABLE llx_societe MODIFY COLUMN fk_typent integer DEFAULT NULL;
+-- VMYSQL4.3 ALTER TABLE llx_societe MODIFY COLUMN fk_typent integer NULL;
+-- VPGSQL8.2 ALTER TABLE llx_societe ALTER COLUMN fk_typent DROP NOT NULL;
 UPDATE llx_societe SET fk_typent=NULL WHERE fk_typent=0;
 DELETE FROM llx_c_typent WHERE code='TE_UNKNOWN';