diff --git a/rattail/batch/custorder.py b/rattail/batch/custorder.py
index 12d486bf12d19c2a66e9e71ed98ca8b209fa0543..fbad967fd2ece6516069f70994fe846553690af6 100644
--- a/rattail/batch/custorder.py
+++ b/rattail/batch/custorder.py
@@ -397,6 +397,20 @@ class CustomerOrderBatchHandler(BatchHandler):
            return that reason as a string; otherwise ``None``.
         """
 
+    def add_product(self, batch, product, order_quantity, order_uom,
+                    **kwargs):
+        """
+        Add a new row to the batch, for the given product and order
+        quantity.
+        """
+        row = self.make_row()
+        row.item_entry = product.uuid
+        row.product = product
+        row.order_quantity = order_quantity
+        row.order_uom = order_uom
+        self.add_row(batch, row)
+        return row
+
     def refresh_row(self, row):
         if not row.product:
             if row.item_entry: