diff --git a/src/controllers/names.js b/src/controllers/names.js
index 3e55e8d..318b942 100755
--- a/src/controllers/names.js
+++ b/src/controllers/names.js
@@ -195,6 +195,8 @@ NamesController.transferName = function(name, privatekey, address) {
 
 NamesController.updateName = function(name, privatekey, a) {
 	return new Promise(function(resolve, reject) {
+		a = a || "";
+		
 		if (!name) {
 			return reject(new errors.ErrorMissingParameter('name'));
 		}
@@ -203,15 +205,11 @@ NamesController.updateName = function(name, privatekey, a) {
 			return reject(new errors.ErrorMissingParameter('privatekey'));
 		}
 
-		if (!a) {
-			return reject(new errors.ErrorMissingParameter('a'));
-		}
-
 		if (!krist.isValidName(name)) {
 			return reject(new errors.ErrorInvalidParameter('name'));
 		}
 
-		if (!krist.isValidARecord(a)) {
+		if (a && !krist.isValidARecord(a)) {
 			return reject(new errors.ErrorInvalidParameter('a'));
 		}