diff --git a/sql/tables.sql b/sql/tables.sql
index ff02145..f35d004 100644
--- a/sql/tables.sql
+++ b/sql/tables.sql
@@ -96,7 +96,6 @@ name CHAR(255),
 description CHAR(255),
 parent_id INTEGER,
 creator_id INTEGER,
-document_type_id INTEGER NOT NULL,
 unit_id INTEGER,
 is_public BIT NOT NULL,
 parent_folder_ids TEXT,
@@ -272,6 +271,14 @@ id INTEGER NOT NULL UNIQUE AUTO_INCREMENT,
 name CHAR(50) NOT NULL
 )TYPE = InnoDB;
 
+
+CREATE TABLE folder_doctypes_link (
+  id int(11) NOT NULL auto_increment,
+  folder_id int(11) NOT NULL default '0',
+  document_type_id int(11) NOT NULL default '0',
+  UNIQUE KEY id (id)
+) TYPE=InnoDB;
+
 CREATE TABLE web_sites ( 
 id INTEGER NOT NULL UNIQUE AUTO_INCREMENT,
 web_site_name CHAR(100) NOT NULL,
@@ -290,6 +297,11 @@ ADD CONSTRAINT PK_active_sessions
 PRIMARY KEY (id)
 ;
 
+ALTER TABLE folder_doctypes_link
+ADD CONSTRAINT PK_folder_doctypes_link
+PRIMARY KEY (id)
+;
+
 ALTER TABLE document_fields
 ADD CONSTRAINT PK_document_fields
 PRIMARY KEY (id)