diff --git a/core/tx_pool.go b/core/tx_pool.go
index 21fb5e5d0c..31b0690739 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -1224,10 +1224,17 @@ func (pool *TxPool) runReorg(done chan struct{}, reset *txpoolResetRequest, dirt
 	// because of another transaction (e.g. higher gas price).
 	if reset != nil {
 		pool.demoteUnexecutables()
-		if reset.newHead != nil && pool.chainconfig.IsLondon(new(big.Int).Add(reset.newHead.Number, big.NewInt(1))) {
-			pendingBaseFee := misc.CalcBaseFee(pool.chainconfig, reset.newHead)
-			pool.priced.SetBaseFee(pendingBaseFee)
+		if reset.newHead != nil {
+			if pool.chainconfig.IsLondon(new(big.Int).Add(reset.newHead.Number, big.NewInt(1))) {
+				// london fork enabled, reset given the base fee
+				pendingBaseFee := misc.CalcBaseFee(pool.chainconfig, reset.newHead)
+				pool.priced.SetBaseFee(pendingBaseFee)
+			} else {
+				// london fork not enabled, reheap to "reset" the priced list
+				pool.priced.Reheap()
+			}
 		}
+
 		// Update all accounts to the latest known pending nonce
 		nonces := make(map[common.Address]uint64, len(pool.pending))
 		for addr, list := range pool.pending {