diff --git a/core/txpool/txpool.go b/core/txpool/txpool.go
index 20b777c25d..f18eb4c6a0 100644
--- a/core/txpool/txpool.go
+++ b/core/txpool/txpool.go
@@ -104,6 +104,7 @@ func New(gasTip uint64, chain BlockChain, subpools []SubPool) (*TxPool, error) {
 	return pool, nil
 }
 
+// FlushAllTransactions removes all transactions from all subpools
 func (p *TxPool) FlushAllTransactions() {
 	for _, subpool := range p.subpools {
 		subpool.FlushAllTransactions()