diff --git a/doc/conf.py b/doc/conf.py
index 1d67f6c1..63070df2 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -38,7 +38,9 @@ except ImportError:
     print "no sphinx"
 
 APP_DIR = os.path.normpath(os.path.join(os.getcwd(), '../'))
+PACKAGE_DIR1 = os.path.normpath(os.path.join(os.getcwd(), '../'))
 sys.path.insert(0, APP_DIR)
+sys.path.insert(0, PACKAGE_DIR1)
 sys.path.insert(0, os.path.abspath('../GPy'))
 print "sys.path:", sys.path