diff --git a/eth/txtracker/tracker.go b/eth/txtracker/tracker.go
index beaab60977..8458c8253d 100644
--- a/eth/txtracker/tracker.go
+++ b/eth/txtracker/tracker.go
@@ -37,6 +37,7 @@ type PeerStats struct {
 type Chain interface {
 	SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
 	GetBlockByNumber(number uint64) *types.Block
+	GetBlock(hash common.Hash, number uint64) *types.Block
 	CurrentFinalBlock() *types.Header
 }
 
@@ -146,8 +147,9 @@ func (t *Tracker) loop() {
 }
 
 func (t *Tracker) handleChainHead(ev core.ChainHeadEvent) {
-	// Update recent-inclusion EMA from the new head block.
-	block := t.chain.GetBlockByNumber(ev.Header.Number.Uint64())
+	// Fetch the head block by hash (not just number) to avoid using a
+	// reorged block if the tracker goroutine lags behind the chain.
+	block := t.chain.GetBlock(ev.Header.Hash(), ev.Header.Number.Uint64())
 	if block == nil {
 		return
 	}
diff --git a/eth/txtracker/tracker_test.go b/eth/txtracker/tracker_test.go
index 35c315ac8f..36d72def23 100644
--- a/eth/txtracker/tracker_test.go
+++ b/eth/txtracker/tracker_test.go
@@ -35,6 +35,11 @@ func (c *mockChain) GetBlockByNumber(number uint64) *types.Block {
 	return c.blocks[number]
 }
 
+func (c *mockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
+	// In tests we only key by number; ignore hash.
+	return c.GetBlockByNumber(number)
+}
+
 func (c *mockChain) CurrentFinalBlock() *types.Header {
 	c.mu.Lock()
 	defer c.mu.Unlock()