diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 34a504887..2b6d49b5c 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -319,8 +319,7 @@ type argsAndPayload struct {
 
 type Async struct {
 	sync.Mutex
-	sem  chan struct{}
-	pool []*argsAndPayload
+	sem chan struct{}
 }
 
 func (a *Async) send(ctx context.Context, s *PublicTransactionPoolAPI, asyncArgs AsyncSendTxArgs) {