diff --git a/sale.py b/sale.py
new file mode 100644
index 0000000..58e2921
--- /dev/null
+++ b/sale.py
@@ -0,0 +1,6 @@
+from trytond.model import ModelView, ModelSQL
+
+
+class SaleLine(ModelSQL, ModelView, metaclass=PoolMeta):
+    'SaleLine'
+    __name__ = 'sale.line'