diff --git a/app/assets/stylesheets/arclight/modules/mastheads.scss b/app/assets/stylesheets/arclight/modules/mastheads.scss
index 23b9e6714..b873bdb36 100644
--- a/app/assets/stylesheets/arclight/modules/mastheads.scss
+++ b/app/assets/stylesheets/arclight/modules/mastheads.scss
@@ -1,4 +1,5 @@
 .navbar-search {
+  z-index: 10;
   .search-query-form {
     max-width: 100% !important;   // work around blacklight styles
     display: flex;