diff --git a/includes/activity/class-base-object.php b/includes/activity/class-base-object.php
index 1e256cb..218e785 100644
--- a/includes/activity/class-base-object.php
+++ b/includes/activity/class-base-object.php
@@ -555,7 +555,7 @@ class Base_Object {
 	/**
 	 * Convert JSON input to an array.
 	 *
-	 * @return string The JSON string.
+	 * @param string The JSON string.
 	 *
 	 * @return \Activitypub\Activity\Base_Object An Object built from the JSON string.
 	 */