diff --git a/core/pool/pool.go b/core/pool/pool.go
index 56d729e67..c94d546c2 100644
--- a/core/pool/pool.go
+++ b/core/pool/pool.go
@@ -67,6 +67,10 @@ func (p *Pool) Submit(workload interface{}) {
 	p.queue <- work{workload}
 }
 
+func (p *Pool) Stop() {
+	p.done <- true
+}
+
 type work struct {
 	workload interface{}
 }
@@ -84,8 +88,3 @@ func (w *worker) Start() {
 		}
 	}()
 }
-
-// end worker
-func (p *Pool) Stop() {
-	p.done <- true
-}