diff --git a/chrome/content/zotero/xpcom/quickCopy.js b/chrome/content/zotero/xpcom/quickCopy.js
index bc53a6d9f..5bd968bf8 100644
--- a/chrome/content/zotero/xpcom/quickCopy.js
+++ b/chrome/content/zotero/xpcom/quickCopy.js
@@ -91,7 +91,7 @@ Zotero.QuickCopy = new function() {
 	
 	
 	this.hasSiteSettings = function () {
-		return _siteSettings.length > 0;
+		return _siteSettings && _siteSettings.length > 0;
 	};