diff --git a/core/tx_pool.go b/core/tx_pool.go
index 987b43d4a9..3e15d830e4 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -394,7 +394,7 @@ func (pool *TxPool) promoteTx(addr common.Address, hash common.Hash, tx *types.T
 	// Set the potentially new pending nonce and notify any subsystems of the new tx
 	pool.beats[addr] = time.Now()
 	pool.pendingState.SetNonce(addr, tx.Nonce()+1)
-	go pool.eventMux.Post(TxPreEvent{tx})
+	pool.eventMux.Post(TxPreEvent{tx})
 }
 
 // Add queues a single transaction in the pool if it is valid.
diff --git a/event/event.go b/event/event.go
index d3e84f0f7f..93ebfc1bed 100644
--- a/event/event.go
+++ b/event/event.go
@@ -202,10 +202,13 @@ func (s *TypeMuxSubscription) deliver(event *TypeMuxEvent) {
 	}
 	// Otherwise deliver the event
 	s.postMu.RLock()
-	defer s.postMu.RUnlock()
+	go deliver_goroutine(s, event)
+}
 
+func deliver_goroutine(s *TypeMuxSubscription, event *TypeMuxEvent)  {
 	select {
 	case s.postC <- event:
 	case <-s.closing:
 	}
+	s.postMu.RUnlock()
 }