diff --git a/booking.helper.inc b/booking.helper.inc
index 350ab3c..ce2c148 100644
--- a/booking.helper.inc
+++ b/booking.helper.inc
@@ -1653,7 +1653,7 @@ function _booking_readinggroup_email_listing($node) {
 	if(variable_get('booking_enable_html_mail', 0) == 1) {
 		$table = theme('table', array('header' => $header, 'rows' => $rows));
 		watchdog('booking_debug', "<pre>Reading group table\n@info</pre>", array('@info' => print_r($table, true)));
-		return drupal_render($table);
+		return $table;
 	}
 	else {
 		return "";