diff --git a/app/services/survey_responses_data_loader.rb b/app/services/survey_responses_data_loader.rb
index 895d8343..ae9b3bbd 100644
--- a/app/services/survey_responses_data_loader.rb
+++ b/app/services/survey_responses_data_loader.rb
@@ -50,6 +50,7 @@ class SurveyResponsesDataLoader
     end.compact
   end
 
+  private_class_method :process_row
 end
 
 module StringMonkeyPatches