--- src/VBox/Additions/common/VBoxGuest/lib/Makefile.kmk.orig	2020-07-10 02:50:06.000000000 +1000
+++ src/VBox/Additions/common/VBoxGuest/lib/Makefile.kmk	2020-08-23 02:19:14.141853000 +1000
@@ -39,13 +39,13 @@
 	VBoxGuestR3Lib \
 	VBoxGuestR3LibShared
 ifndef VBOX_ONLY_VALIDATIONKIT
- if1of ($(KBUILD_TARGET), freebsd linux netbsd openbsd)
+ if1of ($(KBUILD_TARGET), bsdsunix freebsd linux netbsd openbsd)
  ifndef VBOX_USE_SYSTEM_XORG_HEADERS
   LIBRARIES += \
   	VBoxGuestR3LibXFree86
  endif
  endif
- if1of ($(KBUILD_TARGET), freebsd linux netbsd openbsd solaris)
+ if1of ($(KBUILD_TARGET), bsdsunix freebsd linux netbsd openbsd solaris)
   LIBRARIES += \
   	VBoxGuestR3LibXOrg
  endif