diff --git a/manifests/init.pp b/manifests/init.pp
index e7f4b9a..0e934f0 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -5,6 +5,7 @@
 # @param grafana_password is the password for Grafana to read from the DB
 # @param ledger_repo is the git repo for ledger data
 # @param ledger_ssh_key is the ssh key to use to update the repo
+# @param ledger_file is the main ledger file to load, relative to the repo root
 # @param version sets the ledgersql tag to use
 # @param postgres_ip sets the address of the postgres Docker container
 # @param user sets the user to run ledgersql as
@@ -16,6 +17,7 @@
   String $grafana_password,
   String $ledger_repo,
   String $ledger_ssh_key,
+  String $ledger_file = 'core.ldg',
   String $version = 'v0.0.1',
   String $postgres_ip = '172.17.0.3',
   String $user = 'ledgersql',
diff --git a/templates/config.yaml.erb b/templates/config.yaml.erb
index d5a7361..7210d57 100644
--- a/templates/config.yaml.erb
+++ b/templates/config.yaml.erb
@@ -1,3 +1,4 @@
 data_dir: <%= @datadir %>
+data_file: <%= @ledger_file %>
 database_password: <%= @database_password %>
 database_host: <%= @postgres_ip %>