diff --git a/g/container/gset/gset.go b/g/container/gset/gset.go
index 7f01bc45d..8c02bd33b 100644
--- a/g/container/gset/gset.go
+++ b/g/container/gset/gset.go
@@ -125,19 +125,17 @@ func (set *Set) String() string {
 }
 
 // LockFunc locks writing with callback function <f>.
-func (set *Set) LockFunc(f func(m map[interface{}]struct{})) *Set {
+func (set *Set) LockFunc(f func(m map[interface{}]struct{})) {
     set.mu.Lock()
     defer set.mu.Unlock()
     f(set.m)
-    return set
 }
 
 // RLockFunc locks reading with callback function <f>.
-func (set *Set) RLockFunc(f func(m map[interface{}]struct{})) *Set {
+func (set *Set) RLockFunc(f func(m map[interface{}]struct{})) {
     set.mu.RLock()
     defer set.mu.RUnlock()
     f(set.m)
-    return set
 }
 
 // Equal checks whether the two sets equal.
diff --git a/g/container/gset/gset_int_set.go b/g/container/gset/gset_int_set.go
index 6e018d5fa..338952ff8 100644
--- a/g/container/gset/gset_int_set.go
+++ b/g/container/gset/gset_int_set.go
@@ -119,19 +119,17 @@ func (set *IntSet) String() string {
 }
 
 // LockFunc locks writing with callback function <f>.
-func (set *IntSet) LockFunc(f func(m map[int]struct{})) *IntSet {
+func (set *IntSet) LockFunc(f func(m map[int]struct{})) {
 	set.mu.Lock()
 	defer set.mu.Unlock()
 	f(set.m)
-    return set
 }
 
 // RLockFunc locks reading with callback function <f>.
-func (set *IntSet) RLockFunc(f func(m map[int]struct{})) *IntSet {
+func (set *IntSet) RLockFunc(f func(m map[int]struct{})) {
     set.mu.RLock()
     defer set.mu.RUnlock()
     f(set.m)
-    return set
 }
 
 // Equal checks whether the two sets equal.
diff --git a/g/container/gset/gset_string_set.go b/g/container/gset/gset_string_set.go
index 4664e5808..7a5d20da4 100644
--- a/g/container/gset/gset_string_set.go
+++ b/g/container/gset/gset_string_set.go
@@ -120,19 +120,17 @@ func (set *StringSet) String() string {
 }
 
 // LockFunc locks writing with callback function <f>.
-func (set *StringSet) LockFunc(f func(m map[string]struct{})) *StringSet {
+func (set *StringSet) LockFunc(f func(m map[string]struct{})) {
 	set.mu.Lock()
 	defer set.mu.Unlock()
 	f(set.m)
-    return set
 }
 
 // RLockFunc locks reading with callback function <f>.
-func (set *StringSet) RLockFunc(f func(m map[string]struct{})) *StringSet {
+func (set *StringSet) RLockFunc(f func(m map[string]struct{})) {
 	set.mu.RLock()
 	defer set.mu.RUnlock()
 	f(set.m)
-    return set
 }
 
 // Equal checks whether the two sets equal.