diff --git a/modules/purchase/purchase.py b/modules/purchase/purchase.py
index 4a02efe..5b00578 100755
--- a/modules/purchase/purchase.py
+++ b/modules/purchase/purchase.py
@@ -1923,12 +1923,7 @@ class Line(sequence_ordered(), ModelSQL, ModelView):
         elif fee.mode == 'ppack':
             invoice_line.quantity = fee.quantity
         else:
-            state_id = 0
-            LotQtType = Pool().get('lot.qt.type')
-            lqt = LotQtType.search([('name','=','BL')])
-            if lqt:
-                state_id = lqt[0].id
-            invoice_line.quantity = fee.get_fee_lots_qt(state_id)
+            invoice_line.quantity = fee.get_fee_lots_qt()
 
         if getattr(fee, 'state', None) != 'invoiced':
             return [invoice_line]
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 859a3bc..7064823 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -2712,8 +2712,6 @@ class PurchaseTradeTestCase(ModuleTestCase):
         reversal_line = Mock()
         fee_model = Mock()
         fee_model.search.return_value = [fee]
-        lqt_model = Mock()
-        lqt_model.search.return_value = []
         invoice_line_model = Mock()
         invoice_line_model.copy.return_value = [reversal_line]
 
@@ -2724,7 +2722,6 @@ class PurchaseTradeTestCase(ModuleTestCase):
                 return_value=previous_line):
             PoolMock.return_value.get.side_effect = lambda name: {
                 'fee.fee': fee_model,
-                'lot.qt.type': lqt_model,
                 'account.invoice.line': invoice_line_model,
             }[name]
 
@@ -2733,6 +2730,7 @@ class PurchaseTradeTestCase(ModuleTestCase):
         self.assertEqual(result, [reversal_line, invoice_line])
         self.assertEqual(invoice_line.fee, fee)
         self.assertEqual(invoice_line.quantity, Decimal('12'))
+        fee.get_fee_lots_qt.assert_called_once_with()
         invoice_line_model.copy.assert_called_once_with(
             [previous_line], default={
                 'invoice': None,
@@ -2759,8 +2757,6 @@ class PurchaseTradeTestCase(ModuleTestCase):
             invoice=Mock(party=Mock()))
         fee_model = Mock()
         fee_model.search.return_value = [fee]
-        lqt_model = Mock()
-        lqt_model.search.return_value = []
 
         with patch(
                 'trytond.modules.purchase.purchase.Pool'
@@ -2769,11 +2765,11 @@ class PurchaseTradeTestCase(ModuleTestCase):
                 return_value=previous_line):
             PoolMock.return_value.get.side_effect = lambda name: {
                 'fee.fee': fee_model,
-                'lot.qt.type': lqt_model,
             }[name]
 
             self.assertEqual(
                 line._get_service_fee_invoice_lines(invoice_line, lot), [])
+        fee.get_fee_lots_qt.assert_called_once_with()
 
     def test_purchase_service_percent_price_fee_invoice_uses_amount_line(self):
         '% price service fee invoice uses a single amount line'