diff --git a/src/Attributes/Param.php b/src/Attributes/Param.php
index ebed651..ea17cfd 100644
--- a/src/Attributes/Param.php
+++ b/src/Attributes/Param.php
@@ -268,6 +268,7 @@ function __clone()
        /** @var Param $item */
        foreach ($this->subObject as $item){
            $item->isParsed = false;
+           $item->value = null;
            $temp[$item->name] = $item;
        }
        $this->subObject = $temp;