--- ati/common/lib/modules/fglrx/build_mod/2.6.x/Makefile.orig	2011-08-01 16:50:22.858326567 +0200
+++ ati/common/lib/modules/fglrx/build_mod/2.6.x/Makefile	2011-08-01 15:54:49.558325829 +0200
@@ -77,7 +77,7 @@
 	KVER        = $(shell uname -r)
 endif
 
-KDIR            = /lib/modules/$(KVER)/build
+KDIR            =? /lib/modules/$(KVER)/build
 PWD             = $(shell pwd)
 
 fglrx-cfiles    = ${fglrx-c-objs:.o=.c}