diff --git a/winworker/create/defaults/main.yml b/winworker/create/defaults/main.yml
index 8ff8590..653b0d5 100644
--- a/winworker/create/defaults/main.yml
+++ b/winworker/create/defaults/main.yml
@@ -1,5 +1,5 @@
 ---
-buildbot_master_host: '' # required ansible hostname
+buildbot_master_host: "{{ groups[buildbot_master_group | default('buildbot-masters')] | first }}"
 buildbot_worker_admin: "Ansible <admin@{{ buildbot_worker_name }}>"
 buildbot_worker_description: "Buildbot Worker build by Ansible"
 
diff --git a/worker/create/defaults/main.yml b/worker/create/defaults/main.yml
index 863ccbe..2e78397 100644
--- a/worker/create/defaults/main.yml
+++ b/worker/create/defaults/main.yml
@@ -1,5 +1,5 @@
 ---
-buildbot_master_host: '' # required ansible hostname
+buildbot_master_host: "{{ groups[buildbot_master_group | default('buildbot-masters')] | first }}"
 buildbot_worker_admin: "Ansible <admin@{{ buildbot_worker_name }}>"
 buildbot_worker_description: "Buildbot worker build by Ansible"
 buildbot_version: '1.1.0'