diff --git a/classes/ETL/Configuration/JsonReferenceWithMacroTransformer.php b/classes/ETL/Configuration/JsonReferenceWithMacroTransformer.php
index b65fc8b149..80c23ea92f 100644
--- a/classes/ETL/Configuration/JsonReferenceWithMacroTransformer.php
+++ b/classes/ETL/Configuration/JsonReferenceWithMacroTransformer.php
@@ -29,7 +29,7 @@ class JsonReferenceWithMacroTransformer extends JsonReferenceTransformer impleme
 
     protected function qualifyPath($path, Configuration $config)
     {
-        if ( ! $localConfigObj instanceof EtlConfiguration ) {
+        if ( ! $config instanceof EtlConfiguration ) {
             $this-logAndThrowException("Local config object is not of type EtlConfiguration");
         }