diff --git a/core/init.go b/core/init.go
index 05f1e59..e287ed1 100644
--- a/core/init.go
+++ b/core/init.go
@@ -5,7 +5,7 @@ import (
 	"time"
 )
 
-var Duration = time.Duration(sillyGirl.GetInt("duration", 5)) * time.Second
+var Duration time.Duration
 
 func init() {
 	killp()
@@ -20,4 +20,5 @@ func init() {
 	InitReplies()
 	initToHandleMessage()
 	initSys()
+	Duration = time.Duration(sillyGirl.GetInt("duration", 5)) * time.Second
 }