--- /n/sources/plan9/sys/src/9/port/sysfile.c	Wed May 14 14:45:01 2014
+++ /sys/src/9/port/sysfile.c	Fri Apr 29 00:00:00 2016
@@ -1233,7 +1233,7 @@
 	strncpy((char*)p, d->gid, 28);
 	p += 28;
 	q = d->qid.path & ~DMDIR;	/* make sure doesn't accidentally look like directory */
-	if(d->qid.type & QTDIR)	/* this is the real test of a new directory */
+	if((ulong)d->qid.type & QTDIR)	/* this is the real test of a new directory */
 		q |= DMDIR;
 	PBIT32(p, q);
 	p += BIT32SZ;