diff --git a/chrome/skin/default/zotero/bindings/tagselector.css b/chrome/skin/default/zotero/bindings/tagselector.css
index ad2f44b7b..22b0659ff 100644
--- a/chrome/skin/default/zotero/bindings/tagselector.css
+++ b/chrome/skin/default/zotero/bindings/tagselector.css
@@ -11,6 +11,7 @@ groupbox
 	overflow-x: hidden;
 	overflow-y: auto;
 	display: block; /* allow labels to wrap instead of all being in one line */
+	background-color: white;
 }
 
 checkbox