diff --git a/manifests/varnish.pp b/manifests/varnish.pp
index e6c9bb9..3d5d66f 100644
--- a/manifests/varnish.pp
+++ b/manifests/varnish.pp
@@ -19,7 +19,9 @@
     # Restart varnish if the systemd unit has changed.
     # Note: system::dropin_file is available in systemd >= 1.0.0
     if defined('::systemd') and defined(Class['::systemd']) and defined(Resource['::systemd::dropin_file']) {
-      Systemd::Dropin_file<| unit == 'varnish.service' |> ~> Class['::varnish::service']
+      Class['::varnish::install']
+      -> Systemd::Dropin_file<| unit == 'varnish.service' |>
+      ~> Class['::varnish::service']
     }
   }