diff --git a/core/includes/common.inc b/core/includes/common.inc
index e2c8784..1a5578d 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2031,8 +2031,8 @@ function _format_date_callback(array $matches = NULL, $new_langcode = NULL) {
  *   - 'absolute': Defaults to FALSE. Whether to force the output to be an
  *     absolute link (beginning with http:). Useful for links that will be
  *     displayed outside the site, such as in an RSS feed.
- *   - 'alias': Defaults to FALSE. Whether the given path is a URL alias
- *     already.
+ *   - 'alias': Defaults to TRUE. If the given path is a URL alias, it is always
+ *     return URL alias.
  *   - 'external': Whether the given path is an external URL.
  *   - 'language': An optional language object. If the path being linked to is
  *     internal to the site, $options['language'] is used to look up the alias
@@ -2068,7 +2068,7 @@ function url($path = NULL, array $options = array()) {
     'fragment' => '',
     'query' => array(),
     'absolute' => FALSE,
-    'alias' => FALSE,
+    'alias' => TRUE,
     'prefix' => ''
   );