Index: /trunk/src/VBox/Additions/linux/module/Makefile.module
===================================================================
--- /trunk/src/VBox/Additions/linux/module/Makefile.module	(revision 410)
+++ /trunk/src/VBox/Additions/linux/module/Makefile.module	(revision 411)
@@ -49,5 +49,5 @@
 # files in /lib/modules/$(uname -r)/build/include, and puts the rest in
 # /lib/modules/$(uname -r)/source/include, which points into the kernel sources
-  EXTRA_INCL = -I/lib/modules/$(shell uname -r)/source/include
+  EXTRA_INCL = /lib/modules/$(shell uname -r)/source/include
  else
  KERN_INCL = /usr/src/linux/include
@@ -88,5 +88,5 @@
 #
 ifndef INCL
- INCL    := -I$(KERN_INCL) -I$(EXTRA_INCL)
+ INCL    := -I$(KERN_INCL) $(addprefix -I, $(EXTRA_INCL))
  ifndef KBUILD_EXTMOD
   KBUILD_EXTMOD := $(shell pwd)
Index: /trunk/src/VBox/HostDrivers/Support/linux/Makefile
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/linux/Makefile	(revision 410)
+++ /trunk/src/VBox/HostDrivers/Support/linux/Makefile	(revision 411)
@@ -87,5 +87,5 @@
 # files in /lib/modules/$(uname -r)/build/include, and puts the rest in
 # /lib/modules/$(uname -r)/source/include, which points into the kernel sources
- EXTRA_INCL = -I/lib/modules/$(shell uname -r)/source/include
+ EXTRA_INCL = /lib/modules/$(shell uname -r)/source/include
  $(info Info: using $(KERN_INCL) as the include directory of your Linux kernel. If this is not correct, specify KERN_INCL=<directory> and run Make again.)
 endif
@@ -119,5 +119,5 @@
 #
 ifndef INCL
- INCL    := -I$(KERN_INCL) -I$(EXTRA_INCL)
+ INCL    := -I$(KERN_INCL) $(addprefix -I, $(EXTRA_INCL))
  ifndef KBUILD_EXTMOD
   KBUILD_EXTMOD := $(shell pwd)