diff --git a/purchase.py b/purchase.py
new file mode 100644
index 0000000..b91fd39
--- /dev/null
+++ b/purchase.py
@@ -0,0 +1,6 @@
+from trytond.model import ModelView, ModelSQL
+
+
+class PurchaseLine(ModelSQL, ModelView, metaclass=PoolMeta):
+    'PurhcaseLine'
+    __name__ = 'purchase.line'