diff --git a/roles/alpine/templates/interfaces.j2 b/roles/alpine/templates/interfaces.j2
index 57568cb..2c883ed 100644
--- a/roles/alpine/templates/interfaces.j2
+++ b/roles/alpine/templates/interfaces.j2
@@ -4,15 +4,21 @@ iface lo inet loopback
 {% for iface in interfaces | selectattr('enabled') %}
 auto {{ iface.name }}
 iface {{ iface.name }} inet static
-{% for ip in iface.ip_addresses %}
-    address {{ ip.address }}
-{% set subnet = ip.address | ipaddr('subnet') %}
+{% for address in iface.ip_addresses %}
+    address {{ address.address }}
+{% if address.family.value == 4 %}
+{% set subnet = address.address | ipaddr('subnet') %}
 {% set prefix = prefixes | selectattr('prefix', '==', subnet) | first %}
 {% set gateway = prefix.custom_fields.gateway.address %}
-{% if gateway is defined and gateway != ip.address %}
+{% if gateway is defined and gateway != address.address %}
     gateway {{ gateway | ipaddr('address') }}
 {% endif %}
-{% endfor %}
+{% endif %}
+{% endfor -%}
+
+{# disable SLAAC if we have a manually set IPv6 address #}
+{% if iface.ip_addresses | selectattr("family.value", "==", 6) %}
     pre-up echo 0 > /proc/sys/net/ipv6/conf/$IFACE/autoconf
+{% endif %}
 
 {% endfor %}