diff --git a/js/helpers.js b/js/helpers.js
index 7bb8308e93..432b4612a4 100644
--- a/js/helpers.js
+++ b/js/helpers.js
@@ -99,7 +99,7 @@ function getString(thing) {
 }
 
 function getStringable(thing) {
-	return (typeof thing == "string" || typeof thing == "number" ||
+	return (typeof thing == "string" || typeof thing == "number" || typeof thing == "boolean" ||
 			(thing === Object(thing) &&
 				(thing.__proto__ == StaticArrayBufferProto ||
 				thing.__proto__ == StaticUint8ArrayProto ||
@@ -893,7 +893,7 @@ function doAjax(param) {
 	}
 	$.ajax(URL_BASE + URL_CALLS[param.call] + param.urlParameters, {
 		type: param.httpType,
-		data: jsonThing(param.jsonData),
+		data: param.jsonData && jsonThing(param.jsonData),
 		contentType: 'application/json; charset=utf-8',
 		dataType: 'json',
 		beforeSend: function(xhr) {