diff --git a/preprocessed/preprocess_list.py b/preprocessed/preprocess_list.py
index 80c7ed1..1a35d63 100644
--- a/preprocessed/preprocess_list.py
+++ b/preprocessed/preprocess_list.py
@@ -12,6 +12,7 @@
 # $Revision$
 
 import preprocess
+import os.path
 
 preprocess.main(
       [ "plain" ]