diff --git a/trident-java/core/src/main/java/org/tron/trident/core/ApiWrapper.java b/trident-java/core/src/main/java/org/tron/trident/core/ApiWrapper.java
index 2f8fb78..1b5c082 100644
--- a/trident-java/core/src/main/java/org/tron/trident/core/ApiWrapper.java
+++ b/trident-java/core/src/main/java/org/tron/trident/core/ApiWrapper.java
@@ -2685,7 +2685,7 @@ public TransactionExtention exchangeTransaction(String ownerAddress, long exchan
             .setExchangeId(exchangeId)
             .setTokenId(ByteString.copyFrom(tokenId.getBytes()))
             .setQuant(amount)
-            .setExpected(exchangeId)
+            .setExpected(expected)
             .build();
     return createTransactionExtention(exchangeTransactionContract,
         ContractType.ExchangeTransactionContract);