diff --git a/mongolog/handlers.py b/mongolog/handlers.py
index 6f6aeac..2988555 100644
--- a/mongolog/handlers.py
+++ b/mongolog/handlers.py
@@ -25,7 +25,7 @@
 try:
     import cStringIO  # noqa
 except ImportError:
-    from io import BytesIO, StringIO  # noqa
+    from io import StringIO as cStringIO # noqa
 
 import traceback
 import json