diff --git a/mine-your-first-block/src/main.rs b/mine-your-first-block/src/main.rs
index f239eb7..410e0f7 100644
--- a/mine-your-first-block/src/main.rs
+++ b/mine-your-first-block/src/main.rs
@@ -953,7 +953,7 @@ fn main() {
     // Generate coinbase tx
     let coinbase_tx = create_coinbase_tx(total_fees);
     let serialized_cb_tx = serialize_tx(&coinbase_tx);
-    let cd_tx_bytes = hex::decode(serialized_cb_tx).unwrap();
+    let cd_tx_bytes = hex::decode(serialized_cb_tx.clone()).unwrap();
 
     // coinbase txid
     let coinbase_txid = double_sha256(cd_tx_bytes);