diff --git a/src/Header/ParameterHeader.php b/src/Header/ParameterHeader.php
index 57502b56..701b97a9 100644
--- a/src/Header/ParameterHeader.php
+++ b/src/Header/ParameterHeader.php
@@ -11,7 +11,7 @@
 use ZBateson\MailMimeParser\MailMimeParser;
 use ZBateson\MailMimeParser\Header\Consumer\IConsumerService;
 use ZBateson\MailMimeParser\Header\Consumer\ParameterConsumerService;
-use ZBateson\MailMimeParser\Header\Part\ParameterPart;
+use ZBateson\MailMimeParser\Header\Part\NameValuePart;
 
 /**
  * Represents a header containing an optional main value part and subsequent
@@ -64,7 +64,7 @@ protected function parseHeaderValue(IConsumerService $consumer, string $value) :
     {
         parent::parseHeaderValue($consumer, $value);
         foreach ($this->parts as $part) {
-            if ($part instanceof ParameterPart) {
+            if ($part instanceof NameValuePart) {
                 $this->parameters[\strtolower($part->getName())] = $part;
             }
         }