diff --git a/website/source/docs/builders/proxmox.html.md b/website/source/docs/builders/proxmox.html.md
index ea8beb58d..2345c1911 100644
--- a/website/source/docs/builders/proxmox.html.md
+++ b/website/source/docs/builders/proxmox.html.md
@@ -71,8 +71,9 @@ builder.
 -   `sockets` (int) - How many CPU sockets to give the virtual machine.
     Defaults to `1`
 
--   `os` (string) - The operating system. Can be `linux`, `windows`, `solaris`
-    or `other`. Defaults to `other`.
+-   `os` (string) - The operating system. Can be `wxp`, `w2k`, `w2k3`, `w2k8`,
+    `wvista`, `win7`, `win8`, `win10`, `l24` (Linux 2.4), `l26` (Linux 2.6+),
+    `solaris` or `other`. Defaults to `other`.
 
 -   `network_adapters` (array of objects) - Network adapters attached to the
     virtual machine. Example: