diff --git a/lib/chewy/index/import.rb b/lib/chewy/index/import.rb
index 839501d34..52c846119 100644
--- a/lib/chewy/index/import.rb
+++ b/lib/chewy/index/import.rb
@@ -185,7 +185,7 @@ def import_parallel(objects, routine)
 
             results = ::Parallel.map_with_index(batches, routine.parallel_options) do |ids, index|
               progress_bar.wait_until_ready
-              IMPORT_WORKER.call(index, routine.options, total, progress_bar, ids, self)
+              IMPORT_WORKER.call(self, routine.options, total, progress_bar, ids, index)
             end
 
             ::ActiveRecord::Base.connection.reconnect! if defined?(::ActiveRecord::Base)