diff --git a/swift/common/middleware/domain_remap.py b/swift/common/middleware/domain_remap.py
index a16d080c0d..81798303a9 100644
--- a/swift/common/middleware/domain_remap.py
+++ b/swift/common/middleware/domain_remap.py
@@ -71,6 +71,7 @@ class DomainRemapMiddleware(object):
 def filter_factory(global_conf, **local_conf):
     conf = global_conf.copy()
     conf.update(local_conf)
+
     def domain_filter(app):
         return DomainRemapMiddleware(app, conf)
-    return domain_filter
\ No newline at end of file
+    return domain_filter