diff --git a/lib/Invoice.php b/lib/Invoice.php
index 2ccf99303..a87180e5e 100644
--- a/lib/Invoice.php
+++ b/lib/Invoice.php
@@ -12,6 +12,7 @@
  * @property int $amount_remaining
  * @property int $application_fee
  * @property int $attempt_count
+ * @property bool $auto_advance
  * @property bool $attempted
  * @property string $billing
  * @property string $billing_reason