From e07819293abeaa087b38da9ca26c1adcb67605d7 Mon Sep 17 00:00:00 2001
From: Shijiang Wei <mountkin@gmail.com>
Date: Mon, 17 Aug 2015 21:35:57 +0800
Subject: [PATCH] a quick fix to #15626

Signed-off-by: Shijiang Wei <mountkin@gmail.com>
---
 daemon/daemon.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/daemon/daemon.go b/daemon/daemon.go
index 2ef16242c3..a3f2dace73 100644
--- a/daemon/daemon.go
+++ b/daemon/daemon.go
@@ -979,7 +979,7 @@ func getDefaultRouteMtu() (int, error) {
 		return 0, err
 	}
 	for _, r := range routes {
-		if r.Default {
+		if r.Default && r.Iface != nil {
 			return r.Iface.MTU, nil
 		}
 	}