diff --git a/chrome/content/zotero/xpcom/cite.js b/chrome/content/zotero/xpcom/cite.js
index ddbdf8046..e10951cc9 100644
--- a/chrome/content/zotero/xpcom/cite.js
+++ b/chrome/content/zotero/xpcom/cite.js
@@ -196,19 +196,19 @@ Zotero.Cite.System.retrieveItem = function(item){
 };
 
 Zotero.Cite.System.retrieveLocale = function(lang) {
-	let protHandler = Components.classes["@mozilla.org/network/protocol;1?name=chrome"]
+	var protHandler = Components.classes["@mozilla.org/network/protocol;1?name=chrome"]
 		.createInstance(Components.interfaces.nsIProtocolHandler);
-	let channel = protHandler.newChannel(protHandler.newURI("chrome://zotero/content/locale/csl/locales-"+lang+".xml", "UTF-8", null));
+	var channel = protHandler.newChannel(protHandler.newURI("chrome://zotero/content/locale/csl/locales-"+lang+".xml", "UTF-8", null));
 	try {
-		let rawStream = channel.open();
+		var rawStream = channel.open();
 	} catch(e) {
 		return false;
 	}
-	let converterStream = Components.classes["@mozilla.org/intl/converter-input-stream;1"]
+	var converterStream = Components.classes["@mozilla.org/intl/converter-input-stream;1"]
 						   .createInstance(Components.interfaces.nsIConverterInputStream);
 	converterStream.init(rawStream, "UTF-8", 65535,
 		Components.interfaces.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
-	let str = {};
+	var str = {};
 	converterStream.readString(channel.contentLength, str);
 	converterStream.close();
 	return str.value;