diff --git a/miner/miner.go b/miner/miner.go
index b968b3a92a..22c75b6e1a 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -71,7 +71,7 @@ func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *even
 		eth:      eth,
 		mux:      mux,
 		engine:   engine,
-		exitCh:   make(chan struct{}),
+		exitCh:   make(chan struct{}, 1),
 		worker:   newWorker(config, chainConfig, engine, eth, mux, isLocalBlock, true),
 		canStart: 1,
 	}
diff --git a/miner/worker.go b/miner/worker.go
index 59a47a1220..01e6476125 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -198,7 +198,7 @@ func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus
 		newWorkCh:          make(chan *newWorkReq),
 		taskCh:             make(chan *task),
 		resultCh:           make(chan *types.Block, resultQueueSize),
-		exitCh:             make(chan struct{}),
+		exitCh:             make(chan struct{}, 1),
 		startCh:            make(chan struct{}, 1),
 		resubmitIntervalCh: make(chan time.Duration),
 		resubmitAdjustCh:   make(chan *intervalAdjust, resubmitAdjustChanSize),