diff --git a/core/tx_pool.go b/core/tx_pool.go
index 2160f1481..3dbccdfe9 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -781,16 +781,22 @@ func (pool *TxPool) addTxs(txs []*types.Transaction, local, sync bool) []error {
 			knownTxMeter.Mark(1)
 			continue
 		}
+		// Exclude transactions with invalid signatures as soon as
+		// possible and cache senders in transactions before
+		// obtaining lock
+		_, err := types.Sender(pool.signer, tx)
+		if err != nil {
+			errs[i] = ErrInvalidSender
+			invalidTxMeter.Mark(1)
+			continue
+		}
 		// Accumulate all unknown transactions for deeper processing
 		news = append(news, tx)
 	}
 	if len(news) == 0 {
 		return errs
 	}
-	// Cache senders in transactions before obtaining lock (pool.signer is immutable)
-	for _, tx := range news {
-		types.Sender(pool.signer, tx)
-	}
+
 	// Process all the new transaction and merge any errors into the original slice
 	pool.mu.Lock()
 	newErrs, dirtyAddrs := pool.addTxsLocked(news, local)