diff --git a/plone/formwidget/querystring/querywidget.js b/plone/formwidget/querystring/querywidget.js
index 08d3fe3..92ae5a3 100644
--- a/plone/formwidget/querystring/querywidget.js
+++ b/plone/formwidget/querystring/querywidget.js
@@ -189,6 +189,7 @@
 	    node = $('.querywidget');
 	}
 	if ($().dateinput) {
+            jQuery.tools.dateinput.conf.format = 'dd/mm/yyyy';
             $(node).parents('.criteria').find('.date').dateinput({change: function() { $.querywidget.updateSearch();}, firstDay: 1,selectors: true, trigger: false, yearRange: [-10, 10]}).unbind('change')
                 .bind('onShow', function (event) {
                     var trigger_offset = $(this).next().offset();