diff --git a/front_end/ui/toolbar.css b/front_end/ui/toolbar.css
index dc3babb651..a4619fffd9 100644
--- a/front_end/ui/toolbar.css
+++ b/front_end/ui/toolbar.css
@@ -182,6 +182,7 @@ select.toolbar-item {
     padding: 0 15px 0 5px;
     margin-right: -10px;
     position: relative;
+    background-color: white;
 }
 
 /* Input */