diff --git a/core/includes/common.inc b/core/includes/common.inc
index c9913a2..cbdc7bf 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2247,21 +2247,22 @@ function drupal_http_header_attributes(array $attributes = array()) {
 /**
  * Formats an internal or external URL link as an HTML anchor tag.
  *
- * This function correctly handles aliased paths, and adds an 'active' class
+ * This function correctly handles aliased paths and adds an 'active' class
  * attribute to links that point to the current page (for theming), so all
  * internal links output by modules should be generated by this function if
  * possible.
  *
- * @param $text
- *   The link text for the anchor tag.
- * @param $path
+ * @param string $text
+ *   The translated link text for the anchor tag.
+ * @param string $path
  *   The internal path or external URL being linked to, such as "node/34" or
  *   "http://example.com/foo". After the url() function is called to construct
  *   the URL from $path and $options, the resulting URL is passed through
  *   check_plain() before it is inserted into the HTML anchor tag, to ensure
  *   well-formed HTML. See url() for more information and notes.
  * @param array $options
- *   An associative array of additional options, with the following elements:
+ *   An associative array of additional options. Defaults to an empty array. It
+ *   may contain the following elements.
  *   - 'attributes': An associative array of HTML attributes to apply to the
  *     anchor tag. If element 'class' is included, it must be an array; 'title'
  *     must be a string; other elements are more flexible, as they just need
@@ -2278,8 +2279,10 @@ function drupal_http_header_attributes(array $attributes = array()) {
  *     well as the path must match). This element is also used by url().
  *   - Additional $options elements used by the url() function.
  *
- * @return
+ * @return string
  *   An HTML string containing a link to the given path.
+ *
+ * @see url()
  */
 function l($text, $path, array $options = array()) {
   static $use_theme = NULL;