diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 6683128ef90..6b3cf8fc56f 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -3719,7 +3719,7 @@ function dol_htmloutput_errors($mesgstring='', $mesgarray='', $keepembedded=0)
  *  or descending output and uses optionally natural case insensitive sorting (which
  *  can be optionally case sensitive as well).
  *
- *  @param      array		&$array      		Array to sort
+ *  @param      array		&$array      		Array to sort (array of array('key','otherkey1','otherkey2'...))
  *  @param      string		$index				Key in array to use for sorting criteria
  *  @param      int			$order				Sort order
  *  @param      int			$natsort			1=use "natural" sort (natsort), 0=use "standard sort (asort)