diff --git a/modules/system.eval.inc b/modules/system.eval.inc
index 0e1cd8e5..a1b2c3d4 100644
--- a/modules/system.eval.inc
+++ b/modules/system.eval.inc
@@ -89,7 +89,7 @@ function rules_action_breadcrumb_set(array $titles, array $paths) {
 /**
  * Action Implementation: Send mail.
  */
-function rules_action_mail($to, $cc, $bcc, $subject, $message, $from = NULL, $langcode, $settings, RulesState $state, RulesPlugin $element) {
+function rules_action_mail($to, $cc, $bcc, $subject, $message, $from, $langcode, $settings, RulesState $state, RulesPlugin $element) {
   $to = str_replace(array("\r", "\n"), '', $to);
   $cc = str_replace(array("\r", "\n"), '', $cc);
   $bcc = str_replace(array("\r", "\n"), '', $bcc);