diff --git a/core/includes/path.inc b/core/includes/path.inc
index 44bf3fe..f1e34c6 100644
--- a/core/includes/path.inc
+++ b/core/includes/path.inc
@@ -431,21 +431,27 @@ function path_load($conditions) {
  *   - langcode: (optional) The language code of the alias.
  */
 function path_save(&$path) {
-  $path += array('pid' => NULL, 'langcode' => LANGUAGE_NONE);
+  $path += array('language' => LANGUAGE_NONE);
 
-  // Insert or update the alias.
-  $status = drupal_write_record('url_alias', $path, (!empty($path['pid']) ? 'pid' : array()));
+  // Load the stored alias, if any.
+  if (!empty($path['pid']) && !isset($path['original'])) {
+    $path['original'] = path_load($path['pid']);
+  }
 
-  // Verify that a record was written.
-  if ($status) {
-    if ($status === SAVED_NEW) {
-      module_invoke_all('path_insert', $path);
-    }
-    else {
-      module_invoke_all('path_update', $path);
-    }
-    drupal_clear_path_cache($path['source']);
+  if (empty($path['pid'])) {
+    drupal_write_record('url_alias', $path);
+    module_invoke_all('path_insert', $path);
+  }
+  else {
+    drupal_write_record('url_alias', $path, array('pid'));
+    module_invoke_all('path_update', $path);
   }
+
+  // Clear internal properties.
+  unset($path['original']);
+
+  // Clear the static alias cache.
+  drupal_clear_path_cache($path['source']);
 }
 
 /**