diff --git a/chrome/content/zotero/standalone/extensionsOverlay.xul b/chrome/content/zotero/standalone/extensionsOverlay.xul
index a3b912ba4..24d3f1b93 100644
--- a/chrome/content/zotero/standalone/extensionsOverlay.xul
+++ b/chrome/content/zotero/standalone/extensionsOverlay.xul
@@ -2,6 +2,7 @@
 <overlay id="zotero-addons"
 	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
 	
+	<textbox id="header-search" hidden="true"/>
 	<page id="addons-page">
 		<script type="application/javascript" src="chrome://zotero/content/standalone/extensionsOverlay.js"/>
 	</page>