diff --git a/op/op.Ajax.php b/op/op.Ajax.php
index 8a6bce94f..d7e22d99e 100644
--- a/op/op.Ajax.php
+++ b/op/op.Ajax.php
@@ -68,6 +68,7 @@ if (isset($_COOKIE["mydms_session"])) {
 	$role = $user->getRole();
 	$dms->noReadForStatus = $role->getNoAccess();
 
+	global $logger;
 	$notifier = new SeedDMS_NotificationService($logger);
 	if(isset($GLOBALS['SEEDDMS_HOOKS']['notification'])) {
 		foreach($GLOBALS['SEEDDMS_HOOKS']['notification'] as $notificationObj) {
@@ -847,6 +848,7 @@ switch($command) {
 							$notifier->toGroup($user, $grp, $subject, $message, $params, SeedDMS_NotificationService::RECV_NOTIFICATION);
 						}
 
+						$workflow = $controller->getParam('workflow');
 						if($workflow && $settings->_enableNotificationWorkflow) {
 							$subject = "request_workflow_action_email_subject";
 							$message = "request_workflow_action_email_body";
@@ -873,6 +875,11 @@ switch($command) {
 
 						if($settings->_enableNotificationAppRev) {
 							/* Reviewers and approvers will be informed about the new document */
+							/* Get reviewers and approvers from controller in case it was
+							 * modified in a hook
+							 */
+							$reviewers = $controller->getParam('reviewers');
+							$approvers = $controller->getParam('approvers');
 							if($reviewers['i'] || $reviewers['g']) {
 								$subject = "review_request_email_subject";
 								$message = "review_request_email_body";