diff --git a/__init__.py b/__init__.py
index 194136e53d..2b370ceceb 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,4 +1,4 @@
 #This file is part of Tryton.  The COPYRIGHT file at the top level of this
 #repository contains the full copyright notices and license terms.
 
-from purchase_request import *
+from .purchase_request import *