diff --git a/mail_usability/__openerp__.py b/mail_usability/__openerp__.py
index 3be53b1..4e28ec8 100644
--- a/mail_usability/__openerp__.py
+++ b/mail_usability/__openerp__.py
@@ -42,5 +42,5 @@ Small usability improvements on mails:
     'website': 'http://www.akretion.com',
     'depends': ['mail'],
     'data': [],
-    'installable': True,
+    'installable': False,
 }