diff --git a/koha-tmpl/opac-tmpl/prog/en/css/opac.css b/koha-tmpl/opac-tmpl/prog/en/css/opac.css
index af4a1ceae7..ae9f1b0c2a 100644
--- a/koha-tmpl/opac-tmpl/prog/en/css/opac.css
+++ b/koha-tmpl/opac-tmpl/prog/en/css/opac.css
@@ -2170,6 +2170,7 @@ a.koha_url {
     display: none;
 	background-color:#F3F3F3;
 	padding-bottom:10px;
+    z-index: 100;
 }