diff --git a/htdocs/install/mysql/migration/2.8.0-2.9.0.sql b/htdocs/install/mysql/migration/2.8.0-2.9.0.sql
index dcf196655e3..64b773c3dac 100755
--- a/htdocs/install/mysql/migration/2.8.0-2.9.0.sql
+++ b/htdocs/install/mysql/migration/2.8.0-2.9.0.sql
@@ -187,7 +187,8 @@ ALTER TABLE llx_categorie_member ADD INDEX idx_categorie_member_fk_member (fk_me
 ALTER TABLE llx_categorie_member ADD CONSTRAINT fk_categorie_member_categorie_rowid FOREIGN KEY (fk_categorie) REFERENCES llx_categorie (rowid);
 ALTER TABLE llx_categorie_member ADD CONSTRAINT fk_categorie_member_member_rowid   FOREIGN KEY (fk_member) REFERENCES llx_adherent (rowid);
 
-ALTER TABLE llx_product MODIFY COLUMN canvas  varchar(32)  DEFAULT 'default@product';
+ALTER TABLE llx_product ADD COLUMN    canvas varchar(32) DEFAULT 'default@product';
+ALTER TABLE llx_product MODIFY COLUMN canvas varchar(32) DEFAULT 'default@product';
 UPDATE llx_product SET canvas = 'default@product' WHERE fk_product_type = 0 AND (canvas = '' OR canvas = 'default');
 UPDATE llx_product SET canvas = 'service@product' WHERE fk_product_type = 1 AND (canvas = '' OR canvas = 'service');
 UPDATE llx_product SET canvas = 'livre@droitpret' WHERE canvas = 'livre';