diff --git a/move.py b/move.py
index 5ea5392ab3..377ec3dbac 100644
--- a/move.py
+++ b/move.py
@@ -1517,7 +1517,7 @@ class Line(ModelSQL, ModelView):
                 cls.raise_user_error('already_reconciled',
                         error_args=(line.move.number, line.id,))
 
-        lines = lines[:]
+        lines = list(lines)
         reconcile_account = None
         reconcile_party = None
         amount = Decimal('0.0')