--- linux-2.6.30/Makefile	2009-10-31 13:49:29.000000000 +0100
+++ linux-2.6.30/Makefile	2009-10-31 13:49:32.000000000 +0100
@@ -342,7 +342,7 @@ AFLAGS_KERNEL	=
 
 # Use LINUXINCLUDE when you must reference the include/ directory.
 # Needed to be compatible with the O= option
-LINUXINCLUDE    := -Iinclude \
+LINUXINCLUDE    := $(PRE_CFLAGS) -Iinclude \
                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
                    -I$(srctree)/arch/$(hdr-arch)/include               \
                    -include include/linux/autoconf.h