diff --git a/system/helpers/url_helper.php b/system/helpers/url_helper.php
index bfed96c..5d907d0 100755
--- a/system/helpers/url_helper.php
+++ b/system/helpers/url_helper.php
@@ -544,13 +544,19 @@
  */
 if ( ! function_exists('redirect'))
 {
-	function redirect($uri = '', $method = 'location', $http_response_code = 302)
+	function redirect($uri = '', $method = 'auto', $http_response_code = 302)
 	{
 		if ( ! preg_match('#^https?://#i', $uri))
 		{
 			$uri = site_url($uri);
 		}
 
+		// IIS environment likely? Use 'refresh' for better compatibility
+		if (DIRECTORY_SEPARATOR != '/' && $method == 'auto')
+		{
+			$method = 'refresh';
+		}
+
 		switch($method)
 		{
 			case 'refresh'	: header("Refresh:0;url=".$uri);