diff --git a/manifests/cert.pp b/manifests/cert.pp
index 18b5f02..3c13344 100644
--- a/manifests/cert.pp
+++ b/manifests/cert.pp
@@ -52,12 +52,12 @@ define certbot::cert (
   }
 
   $exec_auth_hook = $auth_hook ? {
-    'loopia' => "--manual-auth-hook ${certbot::cert::bin_dir}/acme-auth-loopia.py",
+    'loopia' => "--manual-auth-hook ${certbot::params::bin_dir}/acme-auth-loopia.py",
     undef    => '',
     default  => "--manual-auth-hook ${auth_hook}",
   }
   $exec_clean_hook = $auth_hook ? {
-    'loopia' => "--manual-auth-hook ${certbot::cert::bin_dir}/acme-cleanup-loopia.py",
+    'loopia' => "--manual-auth-hook ${certbot::params::bin_dir}/acme-cleanup-loopia.py",
     undef    => '',
     default  => "--manual-auth-hook ${auth_hook}",
   }