diff --git a/lib/class-wp-block.php b/lib/class-wp-block.php
index d362dea65a0713..6792158cca12f8 100644
--- a/lib/class-wp-block.php
+++ b/lib/class-wp-block.php
@@ -7,6 +7,8 @@
 
 /**
  * Class representing a parsed instance of a block.
+ *
+ * @property array $attributes
  */
 class WP_Block {