diff --git a/tripleo_ipa/playbooks/README.md b/tripleo_ipa/playbooks/README.md
index 32050c0..d1f46c8 100644
--- a/tripleo_ipa/playbooks/README.md
+++ b/tripleo_ipa/playbooks/README.md
@@ -21,6 +21,10 @@ ok: [localhost] => {
     ]
 }
 ```
+
+If you're including this playbook via another ansible execution, you can fetch
+the one-time password via the ``tripleo_ipa_host_otp`` variable.
+
 > This playbook does not require an active Kerberos token.
 
 > This playbook needs to be run once per openstack deployment.
diff --git a/tripleo_ipa/playbooks/ipa-server-register-undercloud.yaml b/tripleo_ipa/playbooks/ipa-server-register-undercloud.yaml
index e5d76e4..9a29ed8 100644
--- a/tripleo_ipa/playbooks/ipa-server-register-undercloud.yaml
+++ b/tripleo_ipa/playbooks/ipa-server-register-undercloud.yaml
@@ -57,11 +57,11 @@
         fqdn: "{{ undercloud_fqdn }}"
         random_password: true
         force: true
-      register: host_otp
+      register: tripleo_ipa_host_otp
 
     - name: provide OTP generated by IPA server
       debug:
         msg:
-          - "The OTP provided by the IPA server is {{ host_otp.host.randompassword }}"
+          - "The OTP provided by the IPA server is {{ tripleo_ipa_host_otp.host.randompassword }}"
           - "Please add the following to your undercloud.conf:"
-          - "ipa_otp = {{ host_otp.host.randompassword }}"
+          - "ipa_otp = {{ tripleo_ipa_host_otp.host.randompassword }}"