diff --git a/eth/backend.go b/eth/backend.go
index da2e338ced..589773f81a 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -83,7 +83,7 @@ type Ethereum struct {
 
 	bloomRequests     chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
 	bloomIndexer      *core.ChainIndexer             // Bloom indexer operating during block imports
-	closeBloomHandler chan bool
+	closeBloomHandler chan struct{}
 
 	APIBackend *EthAPIBackend
 
@@ -148,7 +148,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 		eventMux:          ctx.EventMux,
 		accountManager:    ctx.AccountManager,
 		engine:            CreateConsensusEngine(ctx, chainConfig, &config.Ethash, config.Miner.Notify, config.Miner.Noverify, chainDb),
-		closeBloomHandler: make(chan bool),
+		closeBloomHandler: make(chan struct{}),
 		networkID:         config.NetworkId,
 		gasPrice:          config.Miner.GasPrice,
 		etherbase:         config.Miner.Etherbase,