diff --git a/src/Receipt.php b/src/Receipt.php
index 3015e6f..db6c6dc 100644
--- a/src/Receipt.php
+++ b/src/Receipt.php
@@ -84,4 +84,7 @@ class Receipt {
     /** @var int */
     public $rezim = 0;
 
+    public function __construct() {
+        $this->dat_trzby = new \DateTime();
+    }
 }