diff --git a/gnucash/report/standard-reports/budget-flow.scm b/gnucash/report/standard-reports/budget-flow.scm
index 81fda0c031..f20a8f39f2 100644
--- a/gnucash/report/standard-reports/budget-flow.scm
+++ b/gnucash/report/standard-reports/budget-flow.scm
@@ -276,7 +276,8 @@
 
          ;; calculate the exchange rates
          (exchange-fn (gnc:case-exchange-fn
-                       price-source report-currency #f))
+                       price-source report-currency
+                       (gnc-budget-get-period-end-date budget period)))
 
          ;; The HTML document
          (doc (gnc:make-html-document)))