diff --git a/website/docs/source/v2/networking/private_network.html.md b/website/docs/source/v2/networking/private_network.html.md
index bef3c5bf5..db87bd36e 100644
--- a/website/docs/source/v2/networking/private_network.html.md
+++ b/website/docs/source/v2/networking/private_network.html.md
@@ -77,3 +77,7 @@ Vagrant.configure("2") do |config|
     auto_config: false
 end
 ```
+
+If you already started the Vagrant environment before setting `auto_config`,
+the files it initially placed there will stay there. You'll have to remove
+those files manually or destroy and recreate the machine.