diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
index 1eabe87..4d5e2be 100644
--- a/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/Wallet.java
@@ -101,7 +101,7 @@ public class Wallet {
             purposeNode = optionalPurposeNode.get();
         }
 
-        purposeNode.fillToIndex(getLookAhead(purposeNode) - 1);
+        purposeNode.fillToIndex(getLookAhead(purposeNode));
         return purposeNode;
     }
 
diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/WalletNode.java b/src/main/java/com/sparrowwallet/drongo/wallet/WalletNode.java
index 19cdd92..e74da7a 100644
--- a/src/main/java/com/sparrowwallet/drongo/wallet/WalletNode.java
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/WalletNode.java
@@ -40,7 +40,7 @@ public class WalletNode implements Comparable<WalletNode> {
         return derivationPath;
     }
 
-    private void parseDerivation() {
+    public void parseDerivation() {
         this.derivation = KeyDerivation.parsePath(derivationPath);
         this.keyPurpose = KeyPurpose.fromChildNumber(derivation.get(0));
         this.index = derivation.get(derivation.size() - 1).num();