diff --git a/partner_prepayment/model/__init__.py b/partner_prepayment/model/__init__.py
index fd7fa4b9075..d725ac0f431 100644
--- a/partner_prepayment/model/__init__.py
+++ b/partner_prepayment/model/__init__.py
@@ -19,5 +19,5 @@
 #
 ##############################################################################
 
-import res_partner
-import sale
+from . import res_partner
+from . import sale