diff --git a/lib/pve/templates.rb b/lib/pve/templates.rb
index 9350cdf..1074ec7 100644
--- a/lib/pve/templates.rb
+++ b/lib/pve/templates.rb
@@ -92,6 +92,7 @@ module PVE::CTTemplate
         ipv6:                      [:string,  false, "IPv6-Address with net-size."],
         gateway6:                  [:string,  false, "IPv6-Address of gateway."],
         storage:                   [:string,  false, "Device will be create on this Storage (default: root)"],
+        ostemplate:                [:string,  false, "OS-Template eg. vztmp/superlinux-1.2-amd64.tar.xz"],
       }
     end