diff --git a/scrapy/settings/default_settings.py b/scrapy/settings/default_settings.py
index 3734a0a58..776c5af23 100644
--- a/scrapy/settings/default_settings.py
+++ b/scrapy/settings/default_settings.py
@@ -158,6 +158,8 @@ FEED_EXPORTERS_BASE = {
 }
 FEED_EXPORT_INDENT = 0
 
+FEED_STORAGE_S3_ACL = None
+
 FILES_STORE_S3_ACL = 'private'
 FILES_STORE_GCS_ACL = ''