diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index e91e2a2..2ec7bef 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -279,7 +279,7 @@
 	 */
 	public function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL)
 	{
-		$path = rtrim($path, '/\\').'/';
+		$path = rtrim($path, '/\\').DIRECTORY_SEPARATOR;
 		if ( ! $fp = @opendir($path))
 		{
 			return FALSE;
@@ -288,7 +288,7 @@
 		// Set the original directory root for child dir's to use as relative
 		if ($root_path === NULL)
 		{
-			$root_path = dirname($path).'/';
+			$root_path = dirname($path).DIRECTORY_SEPARATOR;
 		}
 
 		while (FALSE !== ($file = readdir($fp)))
@@ -300,11 +300,12 @@
 
 			if (@is_dir($path.$file))
 			{
-				$this->read_dir($path.$file.'/', $preserve_filepath, $root_path);
+				$this->read_dir($path.$file.DIRECTORY_SEPARATOR, $preserve_filepath, $root_path);
 			}
 			elseif (FALSE !== ($data = file_get_contents($path.$file)))
 			{
-				$name = str_replace('\\', '/', $path);
+				$name = str_replace("\\", DIRECTORY_SEPARATOR, $path);
+				$name = str_replace("/", DIRECTORY_SEPARATOR, $path);
 				if ($preserve_filepath === FALSE)
 				{
 					$name = str_replace($root_path, '', $name);