diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 11ee290..46ffaa1 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -2140,7 +2140,7 @@
 
 		if (in_array('headers', $include, TRUE))
 		{
-			$raw_data = $this->_header_str."\n";
+			$raw_data = htmlspecialchars($this->_header_str)."\n";
 		}
 
 		if (in_array('subject', $include, TRUE))