diff --git a/core/email.class.inc.php b/core/email.class.inc.php
index 234c19cfd..5817302fc 100644
--- a/core/email.class.inc.php
+++ b/core/email.class.inc.php
@@ -137,7 +137,7 @@ class EMail
 		}
 	}
 
-	protected function AddToHeader($sKey, $sValue)
+	public function AddToHeader($sKey, $sValue)
 	{
 		if (strlen($sValue) > 0)
 		{