diff --git a/src/main/java/com/craigraw/drongo/protocol/TransactionInput.java b/src/main/java/com/craigraw/drongo/protocol/TransactionInput.java
index 26515f5..9ecd4de 100644
--- a/src/main/java/com/craigraw/drongo/protocol/TransactionInput.java
+++ b/src/main/java/com/craigraw/drongo/protocol/TransactionInput.java
@@ -82,6 +82,11 @@ public class TransactionInput extends TransactionPart {
         this.sequence = sequence;
     }
 
+    public int getIndex() {
+        Transaction transaction = (Transaction)parent;
+        return transaction.getInputs().indexOf(this);
+    }
+
     /**
      * Coinbase transactions have special inputs with hashes of zero. If this is such an input, returns true.
      */
diff --git a/src/main/java/com/craigraw/drongo/protocol/TransactionOutput.java b/src/main/java/com/craigraw/drongo/protocol/TransactionOutput.java
index 7bfd0b9..6093ee4 100644
--- a/src/main/java/com/craigraw/drongo/protocol/TransactionOutput.java
+++ b/src/main/java/com/craigraw/drongo/protocol/TransactionOutput.java
@@ -77,4 +77,9 @@ public class TransactionOutput extends TransactionPart {
     public void setAddresses(Address[] addresses) {
         this.addresses = addresses;
     }
+
+    public int getIndex() {
+        Transaction transaction = (Transaction)parent;
+        return transaction.getOutputs().indexOf(this);
+    }
 }