diff --git a/comment_notify.module b/comment_notify.module
index 55ed9f2..d1ada09 100644
--- a/comment_notify.module
+++ b/comment_notify.module
@@ -351,7 +351,14 @@ function _comment_notify_mailalert(CommentInterface $comment) {
   foreach ($author_fields as $author_field) {
     // Send to a subscribed author if they are not the current commenter.
     if ($entity->hasField($author_field)) {
-      $author = $entity->getOwner();
+      // If the entity is a user object, then the user object is the "author'.
+      if ($entity instanceof User) {
+        $author = $entity;
+      }
+      // For now assume every other entity has an "owner".
+      else {
+        $author = $entity->getOwner();
+      }
       $author_notify_settings = comment_notify_get_user_notification_setting($author->id()) ?: comment_notify_get_default_notification_setting();
       $author_email = $author->getEmail();