diff --git a/ethcore/src/miner/miner.rs b/ethcore/src/miner/miner.rs
index 84e29458d..8a87ea189 100644
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@@ -21,6 +21,7 @@ use util::*;
 use util::using_queue::{UsingQueue, GetAction};
 use account_provider::AccountProvider;
 use views::{BlockView, HeaderView};
+use header::Header;
 use state::{State, CleanupMode};
 use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
 use executive::contract_address;
@@ -572,7 +573,16 @@ impl Miner {
 
 		let schedule = chain.latest_schedule();
 		let gas_required = |tx: &SignedTransaction| tx.gas_required(&schedule).into();
+		let best_block_header: Header = ::rlp::decode(&chain.best_block_header());
 		transactions.into_iter()
+			.filter(|tx| match self.engine.verify_transaction_basic(tx, &best_block_header) {
+					Ok(()) => true,
+					Err(e) => {
+						debug!(target: "miner", "Rejected tx {:?} with invalid signature: {:?}", tx.hash(), e);
+						false
+					}
+				}
+			)
 			.map(|tx| match origin {
 				TransactionOrigin::Local | TransactionOrigin::RetractedBlock => {
 					transaction_queue.add(tx, origin, &fetch_account, &gas_required)