diff --git a/document_choose_directory/static/src/js/document_choose_directory.js b/document_choose_directory/static/src/js/document_choose_directory.js
index aa910736..b3e33e87 100644
--- a/document_choose_directory/static/src/js/document_choose_directory.js
+++ b/document_choose_directory/static/src/js/document_choose_directory.js
@@ -57,6 +57,9 @@ openerp.document_choose_directory = function(instance)
             _.chain(attachments)
                 .groupBy(
                     function(a) { return a.parent_id[0] })
+                .sortBy(function(attachments) {
+                    return attachments[0].parent_id[1];
+                })
                 .each(
                     function(group)
                     {