diff --git a/chrome/content/zotero-platform/mac/overlay.css b/chrome/content/zotero-platform/mac/overlay.css
index a6682b49f3..e4a8ac7034 100644
--- a/chrome/content/zotero-platform/mac/overlay.css
+++ b/chrome/content/zotero-platform/mac/overlay.css
@@ -171,7 +171,7 @@
   -moz-box-align: center;
   -moz-appearance: none;
   margin: 0;
-  padding: 3px 0 0;
+  padding: 3px 0 1px;
   background-color: transparent;
   border: solid transparent;
   border-width: 0 4px 0 5px;