diff --git a/ui/css/treeherder-job-buttons.css b/ui/css/treeherder-job-buttons.css
index e86d57020..2a88224c1 100644
--- a/ui/css/treeherder-job-buttons.css
+++ b/ui/css/treeherder-job-buttons.css
@@ -94,6 +94,7 @@
   border-radius: 3px;
   font-size: 12px;
   transform: scale(1.7, 1.7);
+  z-index: 1;
 }
 
 .filter-shown {