diff --git a/InvenTree/InvenTree/exchange.py b/InvenTree/InvenTree/exchange.py
index 3889ebf157..f78789514f 100644
--- a/InvenTree/InvenTree/exchange.py
+++ b/InvenTree/InvenTree/exchange.py
@@ -51,7 +51,8 @@ class InvenTreeExchange(SimpleExchangeBackend):
         rates = super().get_rates(**params)
 
         # Add the base currency to the rates
-        rates[params["base_currency"]] = Decimal("1.0")
+        base_currency = params.get('base', currency_code_default())
+        rates[base_currency] = Decimal("1.0")
 
         return rates