Index: VirtualBox-4.2.20/src/VBox/Additions/x11/vboxvideo/Makefile.kmk
===================================================================
--- VirtualBox-4.2.20.orig/src/VBox/Additions/x11/vboxvideo/Makefile.kmk
+++ VirtualBox-4.2.20/src/VBox/Additions/x11/vboxvideo/Makefile.kmk
@@ -336,6 +336,20 @@ vboxvideo_drv_114_INCS += $(PATH_ROOT)/s
 vboxvideo_drv_114_SOURCES := $(vboxvideo_drv_15_SOURCES)
 
 
+#
+# vboxvideo_drv_115
+#
+DLLS += vboxvideo_drv_115
+vboxvideo_drv_115_TEMPLATE = VBOXGUESTR3XORGMOD
+vboxvideo_drv_115_CFLAGS := $(vboxvideo_drv_70_CFLAGS)
+vboxvideo_drv_115_DEFS := $(vboxvideo_15_DEFS) XORG_VERSION_CURRENT=101500000
+vboxvideo_drv_115_INCS = \
+       $(vboxvideo_xorg_INCS) \
+       /usr/include/xorg
+vboxvideo_drv_115_INCS += $(PATH_ROOT)/src/VBox/Runtime/include
+vboxvideo_drv_115_SOURCES := $(vboxvideo_drv_15_SOURCES)
+
+
 ifdef VBOX_USE_SYSTEM_XORG_HEADERS
  # Build using local X.Org headers.  We assume X.Org Server 1.7 or later.
  DLLS    := $(filter-out vboxvideo_drv_%,$(DLLS)) vboxvideo_drv_system
@@ -389,7 +403,7 @@ $$(vboxvideo_drv_0_OUTDIR)/tstvboxvideo6
 	$$(QUIET)$$(APPEND) -t "$$@" "done"
     endef
 
-    $(foreach ver, _70 _71 _13 _14 _15 _16 _17 _18 _19 _110 _111 _112 _113 _114, $(eval $(def_vboxvideo_test)))
+    $(foreach ver, _70 _71 _13 _14 _15 _16 _17 _18 _19 _110 _111 _112 _113 _114 _115, $(eval $(def_vboxvideo_test)))
 
     endif # ! VBOX_ONLY_SDK
    endif # eq ($(KBUILD_HOST_ARCH),$(KBUILD_TARGET_ARCH))