diff --git a/doc/source/reference/notifications.rst b/doc/source/reference/notifications.rst
index 9a3f2a9e04ac..f9f5f7b8b172 100644
--- a/doc/source/reference/notifications.rst
+++ b/doc/source/reference/notifications.rst
@@ -326,6 +326,11 @@ requires the notification.
 Existing versioned notifications
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+.. note:: Versioned notifications are added in each release, so the samples
+  represented below may not necessarily be in an older version of nova. Ensure
+  you are looking at the correct version of the documentation for the release
+  you are using.
+
 .. This is a reference anchor used in the main index page.
 .. _versioned_notification_samples: