diff --git a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
index 8e1a713ecf7..3f313c180eb 100644
--- a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
+++ b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
@@ -274,5 +274,9 @@ ALTER TABLE llx_bank_account ADD COLUMN pti_in_ctti smallint DEFAULT 0 AFTER dom
 -- Set default ticket type to OTHER if no default exists
 UPDATE llx_c_ticket_type SET use_default=1 WHERE code='OTHER' AND NOT EXISTS(SELECT * FROM (SELECT * FROM llx_c_ticket_type) AS t WHERE use_default=1);
 
+
+ALTER TABLE llx_propal ADD last_main_doc VARCHAR(255) NULL AFTER model_pdf;
+
 UPDATE llx_c_country SET eec=0 WHERE eec IS NULL;
 ALTER TABLE llx_c_country MODIFY COLUMN eec tinyint DEFAULT 0 NOT NULL;
+
diff --git a/htdocs/install/mysql/tables/llx_societe.sql b/htdocs/install/mysql/tables/llx_societe.sql
index c8b78d42fae..c27a0fb2910 100644
--- a/htdocs/install/mysql/tables/llx_societe.sql
+++ b/htdocs/install/mysql/tables/llx_societe.sql
@@ -77,7 +77,8 @@ create table llx_societe
   fk_stcomm                integer        DEFAULT 0 NOT NULL,      		-- commercial status
   note_private             text,                                		--
   note_public              text,                                        --
-  model_pdf				   varchar(255),
+  model_pdf				         varchar(255),
+  last_main_doc			       varchar(255),					-- relative filepath+filename of last main generated document
   prefix_comm              varchar(5),                          		-- prefix commercial (deprecated)
   client                   tinyint        DEFAULT 0,            		-- client 0/1/2
   fournisseur              tinyint        DEFAULT 0,            		-- fournisseur 0/1