inherit from io.RawIOBase in SerialBase instead of everywhere else
diff --git a/serial/serialutil.py b/serial/serialutil.py
index f23f024..4d2c7e0 100644
--- a/serial/serialutil.py
+++ b/serial/serialutil.py
@@ -5,6 +5,7 @@
# (C) 2001-2015 Chris Liechti <cliechti@gmx.net>
# this is distributed under a free software license, see license.txt
+import io
# ``memoryview`` was introduced in Python 2.7 and ``bytes(some_memoryview)``
# isn't returning the contents (very unfortunate). Therefore we need special
@@ -73,7 +74,7 @@
portNotOpenError = SerialException('Attempting to use a port that is not open')
-class SerialBase(object):
+class SerialBase(io.RawIOBase):
"""\
Serial port base class. Provides __init__ function and properties to
get/set port settings.