diff --git a/resources/functions.php b/resources/functions.php
index d87b53ea35..9b0c1ab8ba 100644
--- a/resources/functions.php
+++ b/resources/functions.php
@@ -2124,7 +2124,7 @@ function number_pad($number,$n) {
 
 //validate and format order by clause of select statement
 	if (!function_exists('order_by')) {
-		function order_by($col, $dir, $col_default = '') {
+		function order_by($col, $dir, $col_default = '', $dir_default = 'asc') {
 			$col = preg_replace('#[^a-zA-Z0-9-_.]#', '', $col);
 			$dir = strtolower($dir) == 'desc' ? 'desc' : 'asc';
 			if ($col != '') { return ' order by '.$col.' '.$dir.' '; }