diff --git a/mail_optional_autofollow/__openerp__.py b/mail_optional_autofollow/__openerp__.py
index abd3f76..e2f7769 100644
--- a/mail_optional_autofollow/__openerp__.py
+++ b/mail_optional_autofollow/__openerp__.py
@@ -18,4 +18,5 @@
     'data': [
         'wizard/mail_compose_message_view.xml',
     ],
+    'installable': False,
 }