diff --git a/varnish/defaults/main.yml b/varnish/defaults/main.yml
index fd22bfe2..2de75a15 100644
--- a/varnish/defaults/main.yml
+++ b/varnish/defaults/main.yml
@@ -14,6 +14,7 @@ varnish_thread_pool_add_delay: 0
 varnish_thread_pool_min: 500
 varnish_thread_pool_max: 5000
 varnish_jail: "unix,user=vcache"
+varnish_additional_options: ""
 
 varnish_config_file: /etc/varnish/default.vcl
 varnish_secret_file: /etc/varnish/secret
diff --git a/varnish/templates/varnish.conf.buster.j2 b/varnish/templates/varnish.conf.buster.j2
index 63439b61..77e7d408 100644
--- a/varnish/templates/varnish.conf.buster.j2
+++ b/varnish/templates/varnish.conf.buster.j2
@@ -2,4 +2,4 @@
 
 [Service]
 ExecStart=
-ExecStart=/usr/sbin/varnishd -F -j {{ varnish_jail }} {{ varnish_addresses | map('regex_replace', '^(.*)$', '-a \\1') | list | join(' ') }} -T {{ varnish_management_address }} -f {{ varnish_config_file }} -S {{ varnish_secret_file }} -s {{ varnish_storage }} -p thread_pools={{ varnish_thread_pools }} -p thread_pool_add_delay={{ varnish_thread_pool_add_delay }} -p thread_pool_min={{ varnish_thread_pool_min }} -p thread_pool_max={{ varnish_thread_pool_max }}
+ExecStart=/usr/sbin/varnishd -F -j {{ varnish_jail }} {{ varnish_addresses | map('regex_replace', '^(.*)$', '-a \\1') | list | join(' ') }} -T {{ varnish_management_address }} -f {{ varnish_config_file }} -S {{ varnish_secret_file }} -s {{ varnish_storage }} -p thread_pools={{ varnish_thread_pools }} -p thread_pool_add_delay={{ varnish_thread_pool_add_delay }} -p thread_pool_min={{ varnish_thread_pool_min }} -p thread_pool_max={{ varnish_thread_pool_max }} {{ varnish_additional_options }}