diff --git a/transWhat/yowsupwrapper.py b/transWhat/yowsupwrapper.py
index 11e2d69..98999ed 100644
--- a/transWhat/yowsupwrapper.py
+++ b/transWhat/yowsupwrapper.py
@@ -25,6 +25,7 @@ __email__ = "post@steffenvogel.de"
 """
 
 import logging
+import os
 
 from yowsup import env
 from yowsup.env import S40YowsupEnv