diff --git a/listener/sing_tun/server.go b/listener/sing_tun/server.go
index 384ff016b5..8fe534df53 100644
--- a/listener/sing_tun/server.go
+++ b/listener/sing_tun/server.go
@@ -261,15 +261,17 @@ func New(options LC.Tun, tunnel C.Tunnel, additions ...inbound.Addition) (l *Lis
 		}
 	}
 	l.tunIf = tunIf
-	l.tunStack, err = tun.NewStack(strings.ToLower(options.Stack.String()), stackOptions)
+
+	tunStack, err := tun.NewStack(strings.ToLower(options.Stack.String()), stackOptions)
 	if err != nil {
 		return
 	}
 
-	err = l.tunStack.Start()
+	err = tunStack.Start()
 	if err != nil {
 		return
 	}
+	l.tunStack = tunStack
 
 	//l.openAndroidHotspot(tunOptions)