diff --git a/ui/jquery.ui.datepicker.js b/ui/jquery.ui.datepicker.js
index 692832d197..d54c4fb859 100644
--- a/ui/jquery.ui.datepicker.js
+++ b/ui/jquery.ui.datepicker.js
@@ -1818,7 +1818,7 @@ $.fn.datepicker = function(options){
 	/* Initialise the date picker. */
 	if (!$.datepicker.initialized) {
 		$(document).mousedown($.datepicker._checkExternalClick).
-			find('body').append($.datepicker.dpDiv);
+			find(document.body).append($.datepicker.dpDiv);
 		$.datepicker.initialized = true;
 	}