diff --git a/website/docs/source/v2/provisioning/ansible.html.md b/website/docs/source/v2/provisioning/ansible.html.md
index 619b8e71a..20f48fa0e 100644
--- a/website/docs/source/v2/provisioning/ansible.html.md
+++ b/website/docs/source/v2/provisioning/ansible.html.md
@@ -146,4 +146,13 @@ by the sudo command.
 * `ansible.raw_arguments` is an *unsafe wildcard* string that can be used to take advantage of `ansible-playbook` arguments that are not (yet) supported by this Vagrant provisioner plugin. This can be very useful when integrating with bleeding edge Ansible versions. Following precedence rules apply:
   * Any supported options (described above) will override conflicting `raw_arguments` value (e.g. `--tags` or `--start-at-task`)
   * Vagrant default user authentication can be overridden via `raw_arguments` (with custom values for `--user` and `--private-key`)
+* `ansible.groups` can be used to pass a hash of group names and group members to be included in the generated inventory file.  For example:
+```
+ansible.groups = {
+  "group1" => ["machine1"],
+  "group2" => ["machine2", "machine3"],
+  "all_groups:children" => ["group1", "group2"]
+}
+```
+Note that only the current machine and its related groups will be added to the inventory file.
 * `ansible.host_key_checking` can be set to `false` which will disable host key checking and prevent `"FAILED: (25, 'Inappropriate ioctl for device')"` errors from being reported during provisioner runs.  The default value is `true`, which matches the default behavior of Ansible 1.2.1 and later.