diff --git a/externals/mimemailparser/MimeMailParser.class.php b/externals/mimemailparser/MimeMailParser.class.php
index 914f50888e..40ab1640f5 100644
--- a/externals/mimemailparser/MimeMailParser.class.php
+++ b/externals/mimemailparser/MimeMailParser.class.php
@@ -31,6 +31,11 @@ class MimeMailParser {
 	 */
 	public $attachment_streams;
 
+	/**
+	 * Parts of an email
+	 */
+	private $parts = array();
+
 	/**
 	 * Inialize some stuff
 	 * @return