diff --git a/acl/aclbit.go b/acl/aclbit.go
index b2c1abd..1366a50 100644
--- a/acl/aclbit.go
+++ b/acl/aclbit.go
@@ -8,6 +8,10 @@ import (
 type NumBit int64
 type AclBit int64
 
+const (
+	AllBit AclBit = 9223372036854775807
+)
+
 // New AclBit
 func New(n ...NumBit) AclBit {
 	var i64 AclBit
diff --git a/main.go b/main.go
index 1c8abc8..a38b3e5 100644
--- a/main.go
+++ b/main.go
@@ -37,5 +37,17 @@ func main() {
 	fmt.Println(a.Verify(62))
 	a.SetFalse(62)
 	fmt.Println(a.Verify(62))
+
+	a.SetTrue(63)
 	fmt.Println(a.Verify(63))
+	a.SetFalse(63)
+	fmt.Println(a.Verify(63))
+
+	var ret acl.AclBit
+	var i acl.NumBit
+	for i = 0; i < 63; i++ {
+		ret.SetTrue(i)
+	}
+	fmt.Println(ret)
+	fmt.Println(acl.AllBit)
 }