diff --git a/scrapy/contrib/pipeline/images.py b/scrapy/contrib/pipeline/images.py
index aa0a7b0b44e..9250dc4f7e3 100644
--- a/scrapy/contrib/pipeline/images.py
+++ b/scrapy/contrib/pipeline/images.py
@@ -102,6 +102,8 @@ def _onsuccess(boto_key):
 
     def _get_boto_bucket(self):
         from boto.s3.connection import S3Connection
+        # disable ssl (is_secure=False) because of this python bug:
+        # http://bugs.python.org/issue5103
         c = S3Connection(self.AWS_ACCESS_KEY_ID, self.AWS_SECRET_ACCESS_KEY, is_secure=False)
         return c.get_bucket(self.bucket, validate=False)