diff --git a/document_page/__openerp__.py b/document_page/__openerp__.py
index 5d695fc2..deef9e1a 100644
--- a/document_page/__openerp__.py
+++ b/document_page/__openerp__.py
@@ -27,6 +27,7 @@
     'website': 'http://www.openerp.com/',
     'license': 'AGPL-3',
     'depends': [
+        'mail',
         'knowledge',
     ],
     'data': [
diff --git a/document_page/models/document_page.py b/document_page/models/document_page.py
index b1894d84..b20ca6a3 100644
--- a/document_page/models/document_page.py
+++ b/document_page/models/document_page.py
@@ -29,6 +29,7 @@ class DocumentPage(models.Model):
     """This class is use to manage Document."""
 
     _name = "document.page"
+    _inherit = ['mail.thread']
     _description = "Document Page"
     _order = 'name'