diff --git a/serial/serialcli.py b/serial/serialcli.py
index 0727a52..ddd0cdf 100644
--- a/serial/serialcli.py
+++ b/serial/serialcli.py
@@ -7,6 +7,8 @@
 #
 # SPDX-License-Identifier:    BSD-3-Clause
 
+from __future__ import absolute_import
+
 import System
 import System.IO.Ports
 from serial.serialutil import *