Index: /trunk/src/VBox/Additions/WINNT/Graphics/Video/disp/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/WINNT/Graphics/Video/disp/Makefile.kmk	(revision 42313)
+++ /trunk/src/VBox/Additions/WINNT/Graphics/Video/disp/Makefile.kmk	(revision 42314)
@@ -86,5 +86,5 @@
 VBoxDispD3D_TEMPLATE = VBOXGUESTR3DLL
 VBoxDispD3D_SDKS     = ReorderCompilerIncs $(VBOX_WINDDK_GST_WLH)
-VBoxDispD3D_DEFS     = UNICODE _UNICODE VBOX_WITH_WDDM VBOXWDDMDISP LOG_TO_BACKDOOR LOG_TO_BACKDOOR_DRV VBOX_WITH_HGCM
+VBoxDispD3D_DEFS     = UNICODE _UNICODE VBOX_WITH_WDDM VBOXWDDMDISP LOG_TO_BACKDOOR LOG_TO_BACKDOOR_DRV VBOX_WITH_HGCM D3D_UMD_INTERFACE_VERSION=0x000C
 ifdef DEBUG_misha
 VBoxDispD3D_DEFS    += LOG_ENABLED
Index: /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/Makefile.kmk	(revision 42313)
+++ /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/Makefile.kmk	(revision 42314)
@@ -66,5 +66,5 @@
  VBoxVideoWddm_TEMPLATE    = VBOXGUESTR0
  VBoxVideoWddm_SDKS        = ReorderCompilerIncs $(VBOX_WINDDK_GST_WLH)
- VBoxVideoWddm_DEFS       += VBOX_WITH_8BPP_MODES
+ VBoxVideoWddm_DEFS       += VBOX_WITH_8BPP_MODES DXGKDDI_INTERFACE_VERSION=0x1053
  VBoxVideoWddm_DEFS       += VBOX_WDDM_MINIPORT VBOX_WITH_WDDM VBOX_WITH_HGCM
  ifdef VBOX_WITH_VIDEOHWACCEL
@@ -160,5 +160,5 @@
   VBoxVideoW8_TEMPLATE   = VBOXGUESTR0
   VBoxVideoW8_SDKS       = $(VBOX_WINDDK_GST_W8) # No ReorderCompilerIncs here!
-  VBoxVideoW8_DEFS       = $(VBoxVideoWddm_DEFS) VBOX_WDDM_WIN8
+  VBoxVideoW8_DEFS       = $(subst DXGKDDI_INTERFACE_VERSION=0x1053,DXGKDDI_INTERFACE_VERSION=0x300E,$(VBoxVideoWddm_DEFS)) VBOX_WDDM_WIN8
   VBoxVideoW8_SOURCES    = $(subst VBoxMPWddm.rc,VBoxMPW8.rc,$(VBoxVideoWddm_SOURCES))
   VBoxVideoW8_LIBS.x86   = $(NO_SUCH_VARIABLE)