diff --git a/htdocs/install/mysql/migration/3.3.0-3.4.0.sql b/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
index a58eb45f1ba..f7fe723b9b6 100755
--- a/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
+++ b/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
@@ -38,7 +38,7 @@ alter table llx_contratdet add column fk_product_fournisseur_price integer after
 alter table llx_contratdet add column buy_price_ht double(24,8) DEFAULT 0 after fk_product_fournisseur_price;
 
 -- serialised array, to store value of select list choices for example
-alter table llx_extrafields add column param text DEFAULT '' after pos;
+alter table llx_extrafields add column param text after pos;
 
 
 alter table llx_propal   CHANGE COLUMN fk_adresse_livraison fk_delivery_address integer;