diff --git a/chrome/content/zotero/reader.xul b/chrome/content/zotero/reader.xul
index 400aa2d7ee..1049602fa6 100644
--- a/chrome/content/zotero/reader.xul
+++ b/chrome/content/zotero/reader.xul
@@ -2,6 +2,7 @@
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
 <?xml-stylesheet href="chrome://zotero/skin/zotero.css" type="text/css"?>
+<?xml-stylesheet href="chrome://zotero/skin/overlay.css" type="text/css"?>
 
 <?xul-overlay href="chrome://zotero/content/standalone/editMenuOverlay.xul"?>
 <?xul-overlay href="chrome://zotero-platform/content/standalone/menuOverlay.xul"?>