diff --git a/S3/S3.py b/S3/S3.py
index 26c516fd..4277fd9e 100644
--- a/S3/S3.py
+++ b/S3/S3.py
@@ -921,6 +921,7 @@ def _sanitize_headers(self, headers):
             # from http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html
             'date',
             'content-length',
+            'content-encoding',
             'last-modified',
             'content-md5',
             'x-amz-version-id',