diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index d77517f2da..c2b099d48a 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3387,7 +3387,12 @@ function add_log()
 }
 
 /**
-* Return a nicely formatted backtrace (parts from the php manual by diz at ysagoon dot com)
+* Return a nicely formatted backtrace.
+*
+* Turns the array returned by debug_backtrace() into HTML markup.
+* Also filters out absolute paths to phpBB root.
+*
+* @return string	HTML markup
 */
 function get_backtrace()
 {