diff --git a/turbo/adapter/ethapi/api.go b/turbo/adapter/ethapi/api.go
index f5b9bd0245b..e733c7bad38 100644
--- a/turbo/adapter/ethapi/api.go
+++ b/turbo/adapter/ethapi/api.go
@@ -112,7 +112,7 @@ func (args *CallArgs) ToMessage(globalGasCap uint64, baseFee *uint256.Int) (type
 			gasFeeCap, gasTipCap = gasPrice, gasPrice
 		} else {
 			// User specified 1559 gas fields (or none), use those
-			gasFeeCap = baseFee
+			gasFeeCap = uint256.MustFromBig(baseFee.ToBig())
 			if args.MaxFeePerGas != nil {
 				overflow := gasFeeCap.SetFromBig(args.MaxFeePerGas.ToInt())
 				if overflow {