diff --git a/manifests/config/file.pp b/manifests/config/file.pp
index 97328b4..36fa65b 100644
--- a/manifests/config/file.pp
+++ b/manifests/config/file.pp
@@ -18,7 +18,7 @@ define fluentd::config::file (
   # clean up to ensure priority changes take effect
   exec { "apply priority change for ${base_name}":
     path    => '/bin:/usr/bin:/usr/local/bin',
-    cwd     => "${::fluentd::conf_dir}",
+    cwd     => $::fluentd::conf_dir,
     command => "rm *-${base_name}",
     onlyif  => "ls *-${base_name} | grep -v ${config_name}",
     before  => File[$config_path],