diff --git a/src/js/amount.js b/src/js/amount.js
index a3f1ac70c3..408f85818d 100644
--- a/src/js/amount.js
+++ b/src/js/amount.js
@@ -699,6 +699,7 @@ Amount.prototype.set_currency = function (c) {
   {
     c.copyTo(this._currency);
   }
+  this._is_native = this._currency.is_native();
 
   return this;
 };