diff --git a/headphones/postprocessor.py b/headphones/postprocessor.py
index 309d613d..b4363d0f 100644
--- a/headphones/postprocessor.py
+++ b/headphones/postprocessor.py
@@ -13,8 +13,11 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Headphones.  If not, see <http://www.gnu.org/licenses/>.
 
+from __future__ import with_statement
+
 import os
 import time
+import threading
 import music_encoder
 import urllib, shutil, re
 from headphones import notifiers