diff --git a/manifests/params.pp b/manifests/params.pp
index 279bbf3..8bb341a 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -5,7 +5,7 @@
 # @param [boolean] pt_manage_fw whether to manage firewall settings
 # @param [string] pt_pm_fqdn the fqdn for the puppetmaster and master
 # settings are applied. any other fqdn # will be considered a puppet agent.
-# @param [string] pt_db_fqdn  the fqdn for the puppetdb host. 
+# @param [string] pt_db_fqdn  the fqdn for the puppetdb host.
 # @param [string] pt_package_url the url for fetching the repo rpm
 # @param [string] pt_pkg_ensure valid: "present", "latest", "v1.2.3"
 # @param [string] pt_agent_pkg the packages for agents to install
@@ -15,8 +15,8 @@
 class puppet_cd::params (
 
   Boolean $pt_manage_fw     = true,
-  String $pt_pm_fqdn        = undef,
-  String $pt_db_fqdn        = undef,
+  String $pt_pm_fqdn        = '',
+  String $pt_db_fqdn        = '',
 
   # installation
   String $pt_package_url    = 'https://yum.puppet.com/puppet8-release-el-9.noarch.rpm',