diff --git a/actor/inbox.go b/actor/inbox.go
index 075de83..27af0f3 100644
--- a/actor/inbox.go
+++ b/actor/inbox.go
@@ -13,10 +13,11 @@ const (
 )
 
 const (
-	stopped int32 = iota
+	new int32 = iota
 	starting
 	idle
 	running
+	stopped
 )
 
 type Scheduler interface {
@@ -55,7 +56,7 @@ func NewInbox(size int) *Inbox {
 	return &Inbox{
 		rb:         ringbuffer.New[Envelope](int64(size)),
 		scheduler:  NewScheduler(defaultThroughput),
-		procStatus: stopped,
+		procStatus: new,
 	}
 }
 
@@ -96,7 +97,7 @@ func (in *Inbox) run() {
 
 func (in *Inbox) Start(proc Processer) {
 	// transition to "starting" and then "idle" to ensure no race condition on in.proc
-	if atomic.CompareAndSwapInt32(&in.procStatus, stopped, starting) {
+	if atomic.CompareAndSwapInt32(&in.procStatus, new, starting) {
 		in.proc = proc
 		atomic.SwapInt32(&in.procStatus, idle)
 		in.schedule()