diff --git a/web/site/css/instances.css b/web/site/css/instances.css
index 61710b0..61ea308 100644
--- a/web/site/css/instances.css
+++ b/web/site/css/instances.css
@@ -137,7 +137,7 @@ img {
 .null, .nulltip {
 	color: #777777;
 }
-.nulltip {
+.nulltip, .tip {
 	text-decoration: underline dotted;
 	text-underline-offset: 3px;
 	text-decoration-thickness: 1px;