diff --git a/rpc/src/v1/helpers/fake_sign.rs b/rpc/src/v1/helpers/fake_sign.rs
index 21cb0cfe1..e5d2c905d 100644
--- a/rpc/src/v1/helpers/fake_sign.rs
+++ b/rpc/src/v1/helpers/fake_sign.rs
@@ -18,6 +18,7 @@ use std::sync::Arc;
 use ethcore::client::MiningBlockChainClient;
 use ethcore::miner::MinerService;
 use ethcore::transaction::{Transaction, SignedTransaction, Action};
+use util::U256;
 
 use jsonrpc_core::Error;
 use v1::helpers::CallRequest;
@@ -33,7 +34,7 @@ pub fn sign_call<B: MiningBlockChainClient, M: MinerService>(
 	Ok(Transaction {
 		nonce: request.nonce.unwrap_or_else(|| client.latest_nonce(&from)),
 		action: request.to.map_or(Action::Create, Action::Call),
-		gas: request.gas.unwrap_or(50_000_000.into()),
+		gas: request.gas.unwrap_or(U256::max_value()),
 		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(&**client, &**miner)),
 		value: request.value.unwrap_or(0.into()),
 		data: request.data.unwrap_or_default(),