diff --git a/includes/common.inc b/includes/common.inc
index b2b9e577ea99a89f7ed2950b3ec93f9d5a95f103..3e593c7cea314cfaf2221630e76f05ea12f23877 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -2703,6 +2703,8 @@ function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1)
 }
 
 /**
+ * Hands off structured Drupal arrays to type-specific *_alter implementations.
+ * 
  * This dispatch function hands off structured Drupal arrays to type-specific
  * *_alter implementations. It ensures a consistent interface for all altering
  * operations.