diff --git a/htdocs/install/mysql/tables/llx_facture.sql b/htdocs/install/mysql/tables/llx_facture.sql
index 081213868cc..d701005666c 100644
--- a/htdocs/install/mysql/tables/llx_facture.sql
+++ b/htdocs/install/mysql/tables/llx_facture.sql
@@ -88,9 +88,9 @@ create table llx_facture
 
   fk_transport_mode     integer,								-- for intracomm report
 
-  situation_cycle_ref smallint,  -- situation cycle reference
-  situation_counter   smallint,  -- situation counter
-  situation_final     smallint,  -- is the situation final ?
+  situation_cycle_ref smallint,  -- situation cycle reference. A key that is similar for all the serie.
+  situation_counter   smallint,  -- situation counter. The number into the serie: 1, 2, ...
+  situation_final     smallint,  -- 0 by default, 1 it if is the final invoice.
 
   retained_warranty							real DEFAULT NULL,  -- % of retained warranty
   retained_warranty_date_limit				date DEFAULT NULL,