diff --git a/scrapy/utils/gz.py b/scrapy/utils/gz.py
index 3e6596b0b..d69fb598d 100644
--- a/scrapy/utils/gz.py
+++ b/scrapy/utils/gz.py
@@ -4,7 +4,6 @@ try:
     from cStringIO import StringIO as BytesIO
 except ImportError:
     from io import BytesIO
-from io import UnsupportedOperation
 from gzip import GzipFile
 
 import six