diff --git a/htdocs/compta/sociales/charges.php b/htdocs/compta/sociales/charges.php
index 3d2886403d4..26dc83e346a 100644
--- a/htdocs/compta/sociales/charges.php
+++ b/htdocs/compta/sociales/charges.php
@@ -299,7 +299,7 @@ if ($chid > 0)
 		print "<td>";
 		if ($cha->paye==0 && $_GET['action'] == 'edit')
 		{
-			print "<input type=\"text\" name=\"period\" value=\"".strftime("%Y%m%d",$cha->periode)."\">";
+			print "<input type=\"text\" name=\"period\" value=\"".strftime("%Y%m%d",$cha->periode)."\"> (YYYYMMDD)";
 		}
 		else
 		{