diff --git a/usr.bin/vmstat/Makefile b/usr.bin/vmstat/Makefile
index 109d6db2035..b082cb62336 100644
--- a/usr.bin/vmstat/Makefile
+++ b/usr.bin/vmstat/Makefile
@@ -1,7 +1,7 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 PROG=	vmstat
-CFLAGS+=-I/sys
+CFLAGS+=-I${.CURDIR}/../../sys
 MAN8=	vmstat.8
 BINGRP=	kmem
 BINMODE=2555