diff --git a/manifests/blackbox_exporter.pp b/manifests/blackbox_exporter.pp
index 7107e34a8..b3f487a4f 100644
--- a/manifests/blackbox_exporter.pp
+++ b/manifests/blackbox_exporter.pp
@@ -9,6 +9,9 @@
 #  [*bin_dir*]
 #  Directory where binaries are located
 #
+#  [*config_file*]
+#  Absolute path to configuration file (blackbox module definitions)
+#
 #  [*download_extension*]
 #  Extension for the release binary archive
 #
@@ -89,6 +92,7 @@
   $modules              = {},
   $arch                 = $::prometheus::params::arch,
   $bin_dir              = $::prometheus::params::bin_dir,
+  $config_file          = '/etc/prometheus/blackbox_exporter.yaml',
   $download_extension   = $::prometheus::params::blackbox_exporter_download_extension,
   $download_url         = undef,
   $download_url_base    = $::prometheus::params::blackbox_exporter_download_url_base,