diff --git a/htdocs/core/class/CMailFile.class.php b/htdocs/core/class/CMailFile.class.php
index 92c657f257f..4b147de05ba 100644
--- a/htdocs/core/class/CMailFile.class.php
+++ b/htdocs/core/class/CMailFile.class.php
@@ -128,6 +128,7 @@ class CMailFile
 
 	// Image
 	public $html;
+	public $msgishtml;
 	public $image_boundary;
 	public $atleastoneimage = 0; // at least one image file with file=xxx.ext into content (TODO Debug this. How can this case be tested. Remove if not used).
 	public $html_images = array();