diff --git a/ethclient/gethclient/gethclient.go b/ethclient/gethclient/gethclient.go
index 39ac4ff20f..deab1b2ffb 100644
--- a/ethclient/gethclient/gethclient.go
+++ b/ethclient/gethclient/gethclient.go
@@ -225,7 +225,7 @@ 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)