diff --git a/website/content/docs/synced-folders/smb.mdx b/website/content/docs/synced-folders/smb.mdx
index fde8ddaa4..4f315ed06 100644
--- a/website/content/docs/synced-folders/smb.mdx
+++ b/website/content/docs/synced-folders/smb.mdx
@@ -89,6 +89,9 @@ The SMB synced folder type has a variety of options it accepts:
   Windows username. If you sign into a domain, specify it as `user@domain`.
   If this option is not specified, Vagrant will prompt you for it.
 
+- `smb_id` (string) - The name for the mount point of this synced folder in the
+  guest machine. This shows up when you run `mount` in the guest machine.
+
 ## Example
 
 The following is an example of using SMB to sync a folder: