diff --git a/mail_attach_existing_attachment/__openerp__.py b/mail_attach_existing_attachment/__manifest__.py
similarity index 98%
rename from mail_attach_existing_attachment/__openerp__.py
rename to mail_attach_existing_attachment/__manifest__.py
index 58f1642d..652c40ae 100644
--- a/mail_attach_existing_attachment/__openerp__.py
+++ b/mail_attach_existing_attachment/__manifest__.py
@@ -40,5 +40,5 @@
     'data': [
         'wizard/mail_compose_message_view.xml',
     ],
-    'installable': True,
+    'installable': False,
 }