diff --git a/ethclient/ethclient.go b/ethclient/ethclient.go
index 83c89a2fd..e8a201f71 100644
--- a/ethclient/ethclient.go
+++ b/ethclient/ethclient.go
@@ -658,6 +658,12 @@ func toCallArg(msg ethereum.CallMsg) interface{} {
 	if msg.GasPrice != nil {
 		arg["gasPrice"] = (*hexutil.Big)(msg.GasPrice)
 	}
+	if msg.GasFeeCap != nil {
+		arg["maxFeePerGas"] = (*hexutil.Big)(msg.GasFeeCap)
+	}
+	if msg.GasTipCap != nil {
+		arg["maxPriorityFeePerGas"] = (*hexutil.Big)(msg.GasTipCap)
+	}
 	return arg
 }