diff --git a/manifests/server.pp b/manifests/server.pp
index 94a43cf..e5a9dd8 100644
--- a/manifests/server.pp
+++ b/manifests/server.pp
@@ -105,6 +105,7 @@
   $master_services = [],
   # Other files
   $header_checks = [],
+  $header_checks_type = 'regexp',
   $body_checks = [],
   # Postscreen - available in Postfix 2.8 and later
   $postscreen                  = false,
diff --git a/templates/main.cf.erb b/templates/main.cf.erb
index 2e0beb0..799b5fa 100644
--- a/templates/main.cf.erb
+++ b/templates/main.cf.erb
@@ -604,7 +604,7 @@ mailbox_command = <%= @mailbox_command %>
 #
 # For details, see "man header_checks".
 #
-header_checks = regexp:<%= @config_directory %>/header_checks
+header_checks = <%= @header_checks_type %>:<%= @config_directory %>/header_checks
 
 # FAST ETRN SERVICE
 #