diff --git a/mail_private/static/src/js/mail_private.js b/mail_private/static/src/js/mail_private.js
index 78ef21e2..f6d77beb 100644
--- a/mail_private/static/src/js/mail_private.js
+++ b/mail_private/static/src/js/mail_private.js
@@ -214,14 +214,6 @@ ChatterComposer.include({
         });
     },
 
-    preprocess_message: function () {
-        var self = this;
-        if (self.options.is_private) {
-            self.context.is_private = true;
-        }
-        return this._super();
-    },
-
     on_open_full_composer: function() {
         if (!this.do_check_attachment_upload()){
             return false;