diff --git a/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css b/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
index c31b7aa9a7..9fdbedb93c 100644
--- a/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
+++ b/koha-tmpl/intranet-tmpl/prog/css/addbiblio.css
@@ -91,6 +91,10 @@ a.tagnum {
 	text-align:right;
 }
 
+.subfield.subfield_mandatory {
+    color: #C00;
+}
+
 .subfieldcode {
 	display: block;
 	float: left;