diff --git a/manifests/server/proxy.pp b/manifests/server/proxy.pp
index dcdbc40..a7ad1a2 100644
--- a/manifests/server/proxy.pp
+++ b/manifests/server/proxy.pp
@@ -43,15 +43,15 @@ define cd_haproxy::server::proxy (
   $haproxy_fqdn     = undef,
   $frontend_name    = undef,
   $frontend_mode    = undef,
-  $fe_use_backend   = '',
+  $fe_use_backend   = [],
   $fe_bind_mode     = undef,
   $frontend_order   = '010',
-  $acl_rule_front   = '',
-  $acl_rule_back    = '',
-  $backend_name     = '',
+  $acl_rule_front   = [],
+  $acl_rule_back    = [],
+  $backend_name     = [],
   $backend_order    = '030',
   $fe_maxconn       = '',
-  $be_server_name   = '',
+  $be_server_name   = [],
   $be_balance       = '',
   $be_mode          = '',