diff --git a/modules/purchase_trade/fee.py b/modules/purchase_trade/fee.py
index 2a75034..40e60f0 100755
--- a/modules/purchase_trade/fee.py
+++ b/modules/purchase_trade/fee.py
@@ -44,7 +44,9 @@ class Fee(ModelSQL,ModelView):
     shipment_out = fields.Many2One('stock.shipment.out', ondelete='CASCADE')
     shipment_internal = fields.Many2One(
         'stock.shipment.internal', ondelete='CASCADE')
-    currency = fields.Many2One('currency.currency',"Currency", required=True)
+    currency = fields.Many2One('currency.currency',"Currency", states={
+            'required': ~Eval('enable_linked_currency'),
+            }, depends=['enable_linked_currency'])
     supplier = fields.Many2One('party.party',"Supplier", required=True)
     type = fields.Selection([
         ('budgeted', 'Budgeted'),
@@ -60,17 +62,14 @@ class Fee(ModelSQL,ModelView):
     enable_linked_currency = fields.Boolean("Linked currencies")
     linked_price = fields.Numeric("Linked Price", digits='unit', states={
             'invisible': ~Eval('enable_linked_currency'),
-            'required': Eval('enable_linked_currency'),
             }, depends=['enable_linked_currency'])
     linked_currency = fields.Many2One('currency.linked', "Linked Currency",
         states={
             'invisible': ~Eval('enable_linked_currency'),
-            'required': Eval('enable_linked_currency'),
             }, depends=['enable_linked_currency'])
     linked_unit = fields.Many2One('product.uom', "Linked Unit",
         states={
             'invisible': ~Eval('enable_linked_currency'),
-            'required': Eval('enable_linked_currency'),
             }, depends=['enable_linked_currency'])
     mode = fields.Selection([
         ('lumpsum', 'Lump sum'),
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 7c8e255..2dd4329 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -2537,9 +2537,20 @@ class PurchaseTradeTestCase(ModuleTestCase):
 
         self.assertEqual(fee.on_change_with_quantity(), Decimal('25'))
 
-    def test_fee_currency_is_required(self):
-        'fee currency is required for every fee mode'
-        self.assertTrue(fee_module.Fee.currency.required)
+    def test_fee_currency_is_conditionally_required_for_linked_currency(self):
+        'fee currency does not block linked currency draft saves'
+        self.assertFalse(fee_module.Fee.currency.required)
+        self.assertIn('required', fee_module.Fee.currency.states)
+        self.assertEqual(
+            fee_module.Fee.currency.states['required'],
+            ~Eval('enable_linked_currency'))
+
+        for field in (
+                fee_module.Fee.linked_price,
+                fee_module.Fee.linked_currency,
+                fee_module.Fee.linked_unit):
+            self.assertFalse(field.required)
+            self.assertNotIn('required', field.states)
 
     def test_fee_get_non_cog_returns_zero_without_move_lines(self):
         'fee non-cog amount is zero before any accounting move line exists'
diff --git a/modules/purchase_trade/view/fee_tree_sequence.xml b/modules/purchase_trade/view/fee_tree_sequence.xml
index 0e84426..b64929f 100755
--- a/modules/purchase_trade/view/fee_tree_sequence.xml
+++ b/modules/purchase_trade/view/fee_tree_sequence.xml
@@ -8,6 +8,7 @@ this repository contains the full copyright notices and license terms. -->
     <field name="mode"/>
     <field name="unit"/>
     <field name="auto_calculation" width="60"/>
+    <field name="enable_linked_currency" width="60"/>
     <field name="price"/>
     <field name="currency"/>
     <field name="weight_type"/>
diff --git a/modules/purchase_trade/view/fee_tree_sequence2.xml b/modules/purchase_trade/view/fee_tree_sequence2.xml
index fff37c4..5c66ca1 100755
--- a/modules/purchase_trade/view/fee_tree_sequence2.xml
+++ b/modules/purchase_trade/view/fee_tree_sequence2.xml
@@ -8,6 +8,7 @@ this repository contains the full copyright notices and license terms. -->
     <field name="mode"/>
     <field name="unit"/>
     <field name="auto_calculation" width="60"/>
+    <field name="enable_linked_currency" width="60"/>
     <field name="price"/>
     <field name="currency"/>
     <field name="weight_type"/>