diff --git a/manifests/init.pp b/manifests/init.pp
index 881be98..06f1b16 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -165,7 +165,7 @@
 
   if $env_var {
     validate_hash($env_var)
-    $env_hash = hiera($env_var)
+    $env_hash = lookup($env_var)
     $env_string = hash2csv($env_hash)
   }
   elsif $_global_environment {