diff --git a/includes/class-wc-discounts.php b/includes/class-wc-discounts.php
index 1e5abef1c0e..7ca05d8dec5 100644
--- a/includes/class-wc-discounts.php
+++ b/includes/class-wc-discounts.php
@@ -17,7 +17,7 @@ class WC_Discounts {
 	 * Reference to cart or order object.
 	 *
 	 * @since 3.2.0
-	 * @var array
+	 * @var WC_Cart|WC_Order
 	 */
 	protected $object;