diff --git a/ansible/roles/baremetal/tasks/pre-install.yml b/ansible/roles/baremetal/tasks/pre-install.yml
index 4dc3142d3e..6c4d9bfecc 100644
--- a/ansible/roles/baremetal/tasks/pre-install.yml
+++ b/ansible/roles/baremetal/tasks/pre-install.yml
@@ -28,7 +28,7 @@
     marker: "# {mark} ANSIBLE GENERATED HOSTS"
     block: |
         {% for host in groups['baremetal'] %}
-        {% set api_interface = hostvars[host]['api_interface'] %}
+        {% set api_interface = hostvars[host]['api_interface'] | replace('-', '_') %}
         {% if host not in groups['bifrost'] or 'ansible_' + api_interface in hostvars[host] %}
         {% set hostnames = [hostvars[host]['ansible_nodename'], hostvars[host]['ansible_hostname']] %}
         {{ 'api' | kolla_address(host) }} {{ hostnames | unique | join(' ') }}
@@ -39,7 +39,7 @@
     - customize_etc_hosts | bool
     # Skip hosts in the bifrost group that do not have a valid api_interface.
     - inventory_hostname not in groups['bifrost'] or
-      'ansible_' + hostvars[inventory_hostname]['api_interface'] in hostvars[inventory_hostname]
+      'ansible_' + hostvars[inventory_hostname]['api_interface'] | replace('-', '_') in hostvars[inventory_hostname]
 
 # NOTE(osmanlicilegi): The distribution might come with cloud-init installed, and manage_etc_hosts
 # configuration enabled. If so, it will override the file /etc/hosts from cloud-init templates at
diff --git a/releasenotes/notes/etc-hosts-dashes-37d0dc07c8fc881f.yaml b/releasenotes/notes/etc-hosts-dashes-37d0dc07c8fc881f.yaml
new file mode 100644
index 0000000000..da5dbc9260
--- /dev/null
+++ b/releasenotes/notes/etc-hosts-dashes-37d0dc07c8fc881f.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixes an issue when generating ``/etc/hosts`` during ``kolla-ansible
+    bootstrap-servers`` when one or more hosts has an ``api_interface`` with
+    dashes (``-``) in its name. `LP#1927357
+    <https://bugs.launchpad.net/kolla-ansible/+bug/1927357>`__