diff --git a/defaults/main.yml b/defaults/main.yml
index 852fcbd5..a89bba50 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -529,9 +529,11 @@ nova_api_os_compute_uwsgi_ini_overrides: {}
 # Example 2:
 # nova_enabled_mdev_types:
 #   - type: nvidia-35
-#     address: <device address>
+#     address: "<device address.0>,<device address.1>"
 #   - type: nvidia-36
-#     address: <another device address>
+#     address:
+#       - "<another device address.0>"
+#       - "<another device address.1>"
 nova_enabled_mdev_types: "{{ nova_enabled_vgpu_types | default({}) }}"
 
 # PCI devices passthrough to nova
diff --git a/templates/nova.conf.j2 b/templates/nova.conf.j2
index a582e36d..d536fbdc 100644
--- a/templates/nova.conf.j2
+++ b/templates/nova.conf.j2
@@ -307,7 +307,7 @@ enabled_mdev_types = {{ nova_enabled_mdev_types | map(attribute='type') | list |
 
 {% for record in nova_enabled_mdev_types | selectattr('address', 'defined') | list %}
 [mdev_{{ record.type }}]
-device_addresses = {{ record.address }}
+device_addresses = {{ (record.address is string) | ternary(record.address, record.address | join(',')) }}
 {% endfor %}
 {% endif %}