diff --git a/htdocs/product/stock/fiche.php b/htdocs/product/stock/fiche.php
index e7f64e273c2..30d0e34293f 100644
--- a/htdocs/product/stock/fiche.php
+++ b/htdocs/product/stock/fiche.php
@@ -171,7 +171,7 @@ if ($_GET["action"] == 'create')
 	print '<table class="border" width="100%">';
 
 	// Ref
-	print '<tr><td width="25%">'.$langs->trans("Ref").'</td><td colspan="3"><input name="libelle" size="20" value=""></td></tr>';
+	print '<tr><td width="25%" class="fieldrequired">'.$langs->trans("Ref").'</td><td colspan="3"><input name="libelle" size="20" value=""></td></tr>';
 
 	print '<tr><td >'.$langs->trans("LocationSummary").'</td><td colspan="3"><input name="lieu" size="40" value="'.$entrepot->lieu.'"></td></tr>';