diff --git a/backend/templates/_listen.conf b/backend/templates/_listen.conf
index 8f40bea..730f3a7 100644
--- a/backend/templates/_listen.conf
+++ b/backend/templates/_listen.conf
@@ -7,7 +7,7 @@
 {% if certificate -%}
   listen 443 ssl{% if http2_support %} http2{% endif %};
 {% if ipv6 -%}
-  listen [::]:443;
+  listen [::]:443 ssl{% if http2_support %} http2{% endif %};
 {% else -%}
   #listen [::]:443;
 {% endif %}