diff --git a/pool.go b/pool.go
index d2b817d..b51456f 100644
--- a/pool.go
+++ b/pool.go
@@ -200,7 +200,7 @@ func (p *Pool) Tune(size int) {
 }
 
 // Release Closes this pool.
-func (p *Pool) Release() error {
+func (p *Pool) Release() {
 	p.once.Do(func() {
 		atomic.StoreInt32(&p.release, 1)
 		p.lock.Lock()
@@ -212,7 +212,6 @@ func (p *Pool) Release() error {
 		p.workers = nil
 		p.lock.Unlock()
 	})
-	return nil
 }
 
 //---------------------------------------------------------------------------
diff --git a/pool_func.go b/pool_func.go
index e8a8f00..c772de6 100644
--- a/pool_func.go
+++ b/pool_func.go
@@ -205,7 +205,7 @@ func (p *PoolWithFunc) Tune(size int) {
 }
 
 // Release Closed this pool.
-func (p *PoolWithFunc) Release() error {
+func (p *PoolWithFunc) Release() {
 	p.once.Do(func() {
 		atomic.StoreInt32(&p.release, 1)
 		p.lock.Lock()
@@ -217,7 +217,6 @@ func (p *PoolWithFunc) Release() error {
 		p.workers = nil
 		p.lock.Unlock()
 	})
-	return nil
 }
 
 //---------------------------------------------------------------------------