diff --git a/chain/types/ethtypes/eth_transactions.go b/chain/types/ethtypes/eth_transactions.go
index 43419546920..ba4b14f5649 100644
--- a/chain/types/ethtypes/eth_transactions.go
+++ b/chain/types/ethtypes/eth_transactions.go
@@ -104,9 +104,6 @@ func EthTxArgsFromMessage(msg *types.Message) (EthTxArgs, error) {
 				return EthTxArgs{}, xerrors.Errorf("failed to read params byte array: %w", err)
 			}
 
-			if paramsReader.Len() != 0 {
-				return EthTxArgs{}, xerrors.Errorf("extra data found in params")
-			}
 			if len(params) == 0 {
 				// Otherwise, we don't get a guaranteed round-trip.
 				return EthTxArgs{}, xerrors.Errorf("cannot invoke contracts with empty parameters from an eth-account")
@@ -114,6 +111,10 @@ func EthTxArgsFromMessage(msg *types.Message) (EthTxArgs, error) {
 		}
 	}
 
+	if paramsReader.Len() != 0 {
+		return EthTxArgs{}, xerrors.Errorf("extra data found in params")
+	}
+
 	return EthTxArgs{
 		ChainID:              build.Eip155ChainId,
 		Nonce:                int(msg.Nonce),