diff --git a/awscli/customizations/s3/filegenerator.py b/awscli/customizations/s3/filegenerator.py
index e98d78c78edb..6d42476bc67e 100644
--- a/awscli/customizations/s3/filegenerator.py
+++ b/awscli/customizations/s3/filegenerator.py
@@ -203,8 +203,7 @@ def list_files(self, path, dir_op):
                         # means we need to recurse into this sub directory
                         # before yielding the rest of this directory's
                         # contents.
-                        for x in self.list_files(file_path, dir_op):
-                            yield x
+                        yield from self.list_files(file_path, dir_op)
                     else:
                         stats = self._safely_get_file_stats(file_path)
                         if stats: