@@ -2033,6 +2033,7 @@
 			if ( !empty($q['meta_key']) ) {
 				$allowed_keys[] = $q['meta_key'];
 				$allowed_keys[] = 'meta_value';
+				$allowed_keys[] = 'meta_value_num';						/* added */
 			}
 			$q['orderby'] = urldecode($q['orderby']);
 			$q['orderby'] = addslashes_gpc($q['orderby']);
@@ -2056,6 +2057,9 @@
 					case 'meta_value':
 						$orderby = "$wpdb->postmeta.meta_value";
 						break;
+					case 'meta_value_num':
+						$orderby = "$wpdb->postmeta.meta_value+0";		/* added */
+						break;
 					default:
 						$orderby = "$wpdb->posts.post_" . $orderby;
 				}