diff --git a/lib/etl/async_importer.rb b/lib/etl/async_importer.rb
index e41886dd4..4d6fe60b0 100644
--- a/lib/etl/async_importer.rb
+++ b/lib/etl/async_importer.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require_relative "errors"
+
 module ETL
   class AsyncImporter
     include ETL::Errors