diff --git a/ethclient/ethclient.go b/ethclient/ethclient.go
index e8a201f71b..83d66606b9 100644
--- a/ethclient/ethclient.go
+++ b/ethclient/ethclient.go
@@ -647,7 +647,7 @@ func toCallArg(msg ethereum.CallMsg) interface{} {
 		"to":   msg.To,
 	}
 	if len(msg.Data) > 0 {
-		arg["input"] = hexutil.Bytes(msg.Data)
+		arg["data"] = hexutil.Bytes(msg.Data)
 	}
 	if msg.Value != nil {
 		arg["value"] = (*hexutil.Big)(msg.Value)