--- iicdev/Makefile.orig	2008-09-30 23:45:21.000000000 +0400
+++ iicdev/Makefile	2009-09-17 18:51:51.000000000 +0400
@@ -1,7 +1,7 @@
 SRCS=device_if.h bus_if.h iicdev.h iicdev.c iicdev_ioctl.h 
 KMOD=iicdev
 
-IOCTL_HEADER_DIR ?= /usr/local/include
+IOCTL_HEADER_DIR ?= ${PREFIX}/include
 
 .if defined(DIAGNOSTIC)
 CFLAGS+= -D_DIAGNOSTIC
