diff --git a/src/tx-builder/types/index.ts b/src/tx-builder/types/index.ts
index 7f7ab1a8..2df2b818 100644
--- a/src/tx-builder/types/index.ts
+++ b/src/tx-builder/types/index.ts
@@ -161,7 +161,7 @@ export type Configuration = {
 export type EthereumTransactionTypeExtended = {
   txType: eEthereumTxType;
   tx: () => Promise<transactionType>;
-  gas?: GasResponse;
+  gas: GasResponse;
 };
 
 export type TransactionGenerationMethod = {