diff --git a/wallet/v1/msg.proto b/wallet/v1/msg.proto
index 57e902d..28c9ba4 100644
--- a/wallet/v1/msg.proto
+++ b/wallet/v1/msg.proto
@@ -566,7 +566,7 @@ message CalcBuyAssetRes {
   // Asset asset = 2;
   // double amount = 4;
   BuyAssetSide side = 1;
-  int64 calculated_irt_amount = 2;
+  double calculated_irt_amount = 2;
   double calculated_asset_amount = 3;
   AssetDiscountRes discount_amount = 4;
   EffectiveCommission commission = 5;