From 2acb671fa0b58d3b8903d6e02737f7bbc5df0ca1 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 9 Nov 2002 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2002-11-09

---
 port/devmouse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/port/devmouse.c b/port/devmouse.c
index 0065ca249084955c78b91a0b7ea1a131a258fcd0..31d8b7887267d830fa2cbd68467a406268c6c2ee 100644
--- a/port/devmouse.c
+++ b/port/devmouse.c
@@ -124,7 +124,7 @@ mousewalk(Chan *c, Chan *nc, char **name, int nname)
 	Walkqid *wq;
 
 	wq = devwalk(c, nc, name, nname, mousedir, nelem(mousedir), devgen);
-	if(wq != nil && wq->clone != c && (wq->clone->qid.type&QTDIR)==0)
+	if(wq != nil && wq->clone != c && wq->clone != nil && (wq->clone->qid.type&QTDIR)==0)
 		incref(&mouse);
 	return wq;
 }