diff --git a/modules/purchase_trade/stock.py b/modules/purchase_trade/stock.py
index 7a95fc7..e205967 100755
--- a/modules/purchase_trade/stock.py
+++ b/modules/purchase_trade/stock.py
@@ -405,6 +405,7 @@ RATE_BASIS = [
     (None, ''),
     ('per_day', 'Per Day'),
     ('per_hour', 'Per Hour'),
+    ('mt_per_hour', 'MT/hour'),
     ('per_mt', 'Per MT'),
     ('per_wmt', 'Per WMT'),
     ('per_dmt', 'Per DMT'),
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 5d52564..781baf2 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -152,6 +152,10 @@ class PurchaseTradeTestCase(ModuleTestCase):
 
         self.assertEqual(rate.basis, 'per_day')
 
+    def test_charter_condition_rate_basis_includes_pumping_unit(self):
+        'charter condition rates expose a clear pumping throughput unit'
+        self.assertIn(('mt_per_hour', 'MT/hour'), stock_module.RATE_BASIS)
+
     @with_transaction()
     def test_charter_condition_role_defaults_from_context(self):
         'charter condition role defaults to the business source context'