diff --git a/lib/EphemeralKey.php b/lib/EphemeralKey.php
index f1fb5cab3..f7895ce50 100644
--- a/lib/EphemeralKey.php
+++ b/lib/EphemeralKey.php
@@ -11,6 +11,7 @@
  * @property int $expires
  * @property bool $livemode
  * @property string $secret
+ * @property array $associated_objects
  *
  * @package Stripe
  */