diff --git a/src/wallet_address_validator.js b/src/wallet_address_validator.js
index 7ffecf8d..47c4e95c 100644
--- a/src/wallet_address_validator.js
+++ b/src/wallet_address_validator.js
@@ -6,7 +6,7 @@ module.exports = {
     validate: function (address, currencyNameOrSymbol, networkType) {
         var currency = currencies.getByNameOrSymbol(currencyNameOrSymbol || DEFAULT_CURRENCY_NAME);
 
-        if (currency.validator) {
+        if (currency && currency.validator) {
             return currency.validator.isValidAddress(address, currency, networkType);
         }