diff --git a/chrome/content/zotero/overlay.js b/chrome/content/zotero/overlay.js
index 0aed77312..ebc2a6ef8 100644
--- a/chrome/content/zotero/overlay.js
+++ b/chrome/content/zotero/overlay.js
@@ -2557,7 +2557,7 @@ var ZoteroPane = new function()
 	 *  shift-click == new window, no modifier == frontmost tab
 	 */
 	function loadURI(uri, event, data) {
-		if (Zotero.isStandalone && uri.match("^https?")) {
+		if (Zotero.isStandalone && uri.match(/^https?/)) {
 			var io = Components.classes['@mozilla.org/network/io-service;1']
 						.getService(Components.interfaces.nsIIOService);
 			var uri = io.newURI(uri, null, null);