diff --git a/mysql/migration/2.0.0-2.1.0.sql b/mysql/migration/2.0.0-2.1.0.sql
index 32cbcb2fddd..756e3c12278 100644
--- a/mysql/migration/2.0.0-2.1.0.sql
+++ b/mysql/migration/2.0.0-2.1.0.sql
@@ -72,7 +72,7 @@ create table llx_product_det
 (
   rowid          integer AUTO_INCREMENT PRIMARY KEY,
   fk_product     integer      DEFAULT 0 NOT NULL,
-  fk_lang        integer      DEFAULT 0 NOT NULL,
+  lang           varchar(5)   DEFAULT 0 NOT NULL,
   label          varchar(128),
   description    varchar(255),
   note           text
diff --git a/mysql/tables/llx_product_det.sql b/mysql/tables/llx_product_det.sql
index c97e640c779..587649458cb 100644
--- a/mysql/tables/llx_product_det.sql
+++ b/mysql/tables/llx_product_det.sql
@@ -24,7 +24,7 @@ create table llx_product_det
 (
   rowid          integer AUTO_INCREMENT PRIMARY KEY,
   fk_product     integer      DEFAULT 0 NOT NULL,
-  fk_lang        integer      DEFAULT 0 NOT NULL,
+  lang           varchar(5)   DEFAULT 0 NOT NULL,
   label          varchar(128),
   description    varchar(255),
   note           text