diff -Naur /sys/src/cmd/unix/u9fs/plan9.h u9fs/plan9.h
--- /sys/src/cmd/unix/u9fs/plan9.h	Mon Sep 17 21:23:57 2012
+++ u9fs/plan9.h	Fri Aug 21 02:00:18 2015
@@ -99,7 +99,8 @@
 	UTFmax		= 3,		/* maximum bytes per rune */
 	Runesync	= 0x80,		/* cannot represent part of a UTF sequence (<) */
 	Runeself	= 0x80,		/* rune and UTF sequences are the same (<) */
-	Runeerror	= 0x80		/* decoding error in UTF */
+	Runeerror	= 0x80,		/* decoding error in UTF */
+	Runemax = 0xFFFF
 };
 
 extern	int	runetochar(char*, Rune*);
diff -Naur /sys/src/cmd/unix/u9fs/rune.c u9fs/rune.c
--- /sys/src/cmd/unix/u9fs/rune.c	Tue Apr 23 23:14:53 2013
+++ u9fs/rune.c	Fri Aug 21 01:56:55 2015
@@ -8,6 +8,7 @@
 	Bit2	= 5,
 	Bit3	= 4,
 	Bit4	= 3,
+	Bit5 = 2,
 
 	T1	= ((1<<(Bit1+1))-1) ^ 0xFF,	/* 0000 0000 */
 	Tx	= ((1<<(Bitx+1))-1) ^ 0xFF,	/* 1000 0000 */