diff --git a/core/sender_cacher.go b/core/sender_cacher.go
index 4be53619eb..37dc6f8f42 100644
--- a/core/sender_cacher.go
+++ b/core/sender_cacher.go
@@ -59,8 +59,8 @@ func newTxSenderCacher(threads int) *txSenderCacher {
 
 // cache is an infinite loop, caching transaction senders from various forms of
 // data structures.
-func (cacher *txSenderCacher) cache() {
-	for task := range cacher.tasks {
+func (c *txSenderCacher) cache() {
+	for task := range c.tasks {
 		for i := 0; i < len(task.txs); i += task.inc {
 			types.Sender(task.signer, task.txs[i])
 		}
@@ -70,18 +70,18 @@ func (cacher *txSenderCacher) cache() {
 // Recover recovers the senders from a batch of transactions and caches them
 // back into the same data structures. There is no validation being done, nor
 // any reaction to invalid signatures. That is up to calling code later.
-func (cacher *txSenderCacher) Recover(signer types.Signer, txs []*types.Transaction) {
+func (c *txSenderCacher) Recover(signer types.Signer, txs []*types.Transaction) {
 	// If there's nothing to recover, abort
 	if len(txs) == 0 {
 		return
 	}
 	// Ensure we have meaningful task sizes and schedule the recoveries
-	tasks := cacher.threads
+	tasks := c.threads
 	if len(txs) < tasks*4 {
 		tasks = (len(txs) + 3) / 4
 	}
 	for i := 0; i < tasks; i++ {
-		cacher.tasks <- &txSenderCacherRequest{
+		c.tasks <- &txSenderCacherRequest{
 			signer: signer,
 			txs:    txs[i:],
 			inc:    tasks,
@@ -92,7 +92,7 @@ func (cacher *txSenderCacher) Recover(signer types.Signer, txs []*types.Transact
 // RecoverFromBlocks recovers the senders from a batch of blocks and caches them
 // back into the same data structures. There is no validation being done, nor
 // any reaction to invalid signatures. That is up to calling code later.
-func (cacher *txSenderCacher) RecoverFromBlocks(signer types.Signer, blocks []*types.Block) {
+func (c *txSenderCacher) RecoverFromBlocks(signer types.Signer, blocks []*types.Block) {
 	count := 0
 	for _, block := range blocks {
 		count += len(block.Transactions())
@@ -101,5 +101,5 @@ func (cacher *txSenderCacher) RecoverFromBlocks(signer types.Signer, blocks []*t
 	for _, block := range blocks {
 		txs = append(txs, block.Transactions()...)
 	}
-	cacher.Recover(signer, txs)
+	c.Recover(signer, txs)
 }