diff --git a/generator.yml b/generator.yml
index efd71cd..f8cda54 100644
--- a/generator.yml
+++ b/generator.yml
@@ -31,5 +31,5 @@ modules:
     - tcpEstabResets
     - tcpCurrEstab
     lookups:
-    - old_index: ifIndex
-      new_index: ifName
+    - source_indexes: ifIndex
+      lookup: ifName