diff --git a/docs/conf.py b/docs/conf.py
index 54e3a5c7..47c4afbe 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,8 +1,7 @@
 import os
 import sys
 
-sys.path.append('..')
-sys.path.append('.')
+sys.path.extend(['..', '.'])
 import mitogen
 VERSION = '%s.%s.%s' % mitogen.__version__