diff --git a/lib/publickey.js b/lib/publickey.js
index eb8fbf7..76c854f 100644
--- a/lib/publickey.js
+++ b/lib/publickey.js
@@ -248,10 +248,10 @@ PublicKey.fromX = function(odd, x) {
  * @param {String} [compressed] - If the public key is compressed
  * @returns {null|Error} An error if exists
  */
-PublicKey.getValidationError = function(data, compressed) {
+PublicKey.getValidationError = function(data) {
   var error;
   try {
-    new PublicKey(data, compressed);
+    new PublicKey(data);
   } catch (e) {
     error = e;
   }
@@ -266,8 +266,8 @@ PublicKey.getValidationError = function(data, compressed) {
  * @param {String} [compressed] - If the public key is compressed
  * @returns {Boolean} If the public key would be valid
  */
-PublicKey.isValid = function(data, compressed) {
-  return !PublicKey.getValidationError(data, compressed);
+PublicKey.isValid = function(data) {
+  return !PublicKey.getValidationError(data);
 };
 
 /**