diff --git a/purchase.py b/purchase.py
index 9ad6cb1513..d7305f9948 100644
--- a/purchase.py
+++ b/purchase.py
@@ -260,7 +260,7 @@ class Purchase(Workflow, ModelSQL, ModelView):
         # state confirmed splitted into confirmed and processing
         if (TableHandler.table_exist(cursor, PurchaseLine._table)
                 and TableHandler.table_exist(cursor, Move._table)
-                and TableHandler.table_exist(cursor, InvoiceLine.table)):
+                and TableHandler.table_exist(cursor, InvoiceLine._table)):
             purchase_line = PurchaseLine.__table__()
             move = Move.__table__()
             invoice_line = InvoiceLine.__table__()