diff --git includes/file.inc includes/file.inc
index 4f7a4c3..88071a9 100644
--- includes/file.inc
+++ includes/file.inc
@@ -2335,13 +2335,11 @@ function file_directory_temp() {
 
     // Operating system specific dirs.
     if (substr(PHP_OS, 0, 3) == 'WIN') {
-      $directories[] = 'c:\\windows\\temp';
-      $directories[] = 'c:\\winnt\\temp';
-      $path_delimiter = '\\';
+      $directories[] = 'c:/windows/temp';
+      $directories[] = 'c:/winnt/temp';
     }
     else {
       $directories[] = '/tmp';
-      $path_delimiter = '/';
     }
     // PHP may be able to find an alternative tmp directory.
     // This function exists in PHP 5 >= 5.2.1, but Drupal
@@ -2358,8 +2356,8 @@ function file_directory_temp() {
     }
 
     if (empty($temporary_directory)) {
-      // If no directory has been found default to 'files/tmp' or 'files\\tmp'.
-      $temporary_directory = variable_get('file_public_path', conf_path() . '/files') . $path_delimiter . 'tmp';
+      // If no directory has been found default to 'files/tmp'.
+      $temporary_directory = variable_get('file_public_path', conf_path() . '/files') . '/tmp';
     }
     // Save the path of the discovered directory.
     variable_set('file_temporary_path', $temporary_directory);