diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index d68963e..1caebfa 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1691,7 +1691,7 @@ function theme_links($variables) {
 }
 
 /**
- * Builds a render array for theme_dropbutton.
+ * Builds a render array for theme_dropbutton().
  */
 function template_preprocess_dropbutton(&$variables) {
   $variables['attributes']['class'][] = 'dropbutton';
@@ -1716,21 +1716,15 @@ function template_preprocess_dropbutton(&$variables) {
 }
 
 /**
- * Create a dropbutton menu.
- *
- * @param $title
- *   The text to place in the clickable area to activate the dropbutton. This
- *   text is indented to -9999px by default.
- * @param $links
- *   A list of links to provide within the dropbutton, suitable for use
- *   in via Drupal's theme('links').
- * @param $image
- *   If true, the dropbutton link is an image and will not get extra decorations
- *   that a text dropbutton link will.
- * @param $class
- *   An optional class to add to the dropbutton's container div to allow you
- *   to style a single dropbutton however you like without interfering with
- *   other dropbuttons.
+ * Creates a dropbutton menu.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - title: (optional) The text placed in the clickable area to activate the
+ *     dropbutton. Defaults to 'Open dropbutton'.
+ *   - links: An array of links to provide in the dropbutton.
+ *   - attributes: (optional) An associative array of HTML attributes to apply
+ *     to the dropbutton.
  */
 function theme_dropbutton($variables) {
   return render($variables['element']);