diff --git a/lib/BIP32.js b/lib/BIP32.js
index 88af250..8542687 100644
--- a/lib/BIP32.js
+++ b/lib/BIP32.js
@@ -164,7 +164,6 @@ BIP32.prototype.extendedPublicKeyString = function(format) {
     var data = Buffer.concat([this.extendedPublicKey, checksum]);
     return base58.encode(data);
   } else if (format === 'hex') {
-  alert('calc'+this.extendedPublicKey.toString('hex'));
     return this.extendedPublicKey.toString('hex');;
   } else {
     throw new Error('bad format');