diff --git a/tailbone/views/purchasing/ordering.py b/tailbone/views/purchasing/ordering.py
index 8d72ffe4..d562f6e9 100644
--- a/tailbone/views/purchasing/ordering.py
+++ b/tailbone/views/purchasing/ordering.py
@@ -272,7 +272,7 @@ class OrderingBatchView(PurchasingBatchView):
             row.cases_ordered = cases_ordered or None
             row.units_ordered = units_ordered or None
             self.handler.refresh_row(row)
-            batch.rowcount += 1
+            batch.rowcount = (batch.rowcount or 0) + 1
 
         return {
             'row_cases_ordered': '' if not row or row.removed else int(row.cases_ordered or 0),