diff --git a/wallet/v1/msg.proto b/wallet/v1/msg.proto
index d083539..c313add 100644
--- a/wallet/v1/msg.proto
+++ b/wallet/v1/msg.proto
@@ -550,7 +550,7 @@ message BuyAssetRes {
   int64 id = 1;
   Asset asset = 2;
   double amount = 3;
-  double calculated_irt_amount = 4;
+  int64 calculated_irt_amount = 4;
   double calculated_asset_amount = 5;
   double fee_amount = 6;
   double discount_amount = 7;