diff --git a/roles/ifupdown2/templates/interfaces.j2 b/roles/ifupdown2/templates/interfaces.j2
index 4d53123..a1e8f8a 100644
--- a/roles/ifupdown2/templates/interfaces.j2
+++ b/roles/ifupdown2/templates/interfaces.j2
@@ -33,5 +33,9 @@ iface {{ name }}
     ip-forward yes
     ip6-forward yes
 {% endif %}
+{% if iface.ipv6_addrgen is defined %}
+    ipv6-addrgen {{ iface.ipv6_addrgen
+                    | ternary("yes", "no") }}
+{% endif %}
 
 {% endfor %}