diff --git a/examples/doc/tx/004_create_tx.php b/examples/doc/tx/004_create_tx.php
index cc85e6d76..7a747d39b 100644
--- a/examples/doc/tx/004_create_tx.php
+++ b/examples/doc/tx/004_create_tx.php
@@ -45,7 +45,7 @@
     $txIns,
     $txOuts,
     $witnesses,
-    0 /* locktime */
+    $locktime
 );
 
 echo $transaction->getTxId()->getHex().PHP_EOL;