diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 5d48edabe03..741aa0816ef 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -3600,7 +3600,7 @@ function dol_trunc($string, $size = 40, $trunc = 'right', $stringencoding = 'UTF
  *                                  				Example: picto.png                  if picto.png is stored into htdocs/theme/mytheme/img
  *                                  				Example: picto.png@mymodule         if picto.png is stored into htdocs/mymodule/img
  *                                  				Example: /mydir/mysubdir/picto.png  if picto.png is stored into htdocs/mydir/mysubdir (pictoisfullpath must be set to 1)
- *                                                  Example: fontawesome_envelope-open-text_fas_red if you want to use fontaweseome icons: fontawesome_<icon-name>_style_color_size
+ *                                                  Example: fontawesome_envelope-open-text_fas_red_1em if you want to use fontaweseome icons: fontawesome_<icon-name>_<style>_<color>_<size> (only icon-name is mandatory)
  *	@param		string		$moreatt				Add more attribute on img tag (For example 'class="pictofixedwidth"')
  *	@param		boolean|int	$pictoisfullpath		If true or 1, image path is a full path
  *	@param		int			$srconly				Return only content of the src attribute of img.