diff --git a/htdocs/install/mysql/tables/llx_paiement.sql b/htdocs/install/mysql/tables/llx_paiement.sql
index d19d38312a4..dabe261798b 100644
--- a/htdocs/install/mysql/tables/llx_paiement.sql
+++ b/htdocs/install/mysql/tables/llx_paiement.sql
@@ -22,6 +22,7 @@ create table llx_paiement
 (
   rowid            integer AUTO_INCREMENT PRIMARY KEY,
   ref              varchar(30) NULL,                    -- payment reference number
+  ref_ext          varchar(255) NULL,                    -- payment external reference
   entity           integer   DEFAULT 1 NOT NULL,		-- Multi company id
   datec            datetime,							-- date de creation
   tms              timestamp,