--- src/VBox/HostServices/auth/Makefile.kmk.orig	2020-07-10 02:57:07.000000000 +1000
+++ src/VBox/HostServices/auth/Makefile.kmk	2020-08-23 02:45:32.729394000 +1000
@@ -27,12 +27,14 @@
 VBoxAuth_TEMPLATE = VBOXR3
 VBoxAuth_SOURCES.linux = pam/VBoxAuthPAM.c
 VBoxAuth_SOURCES.solaris = pam/VBoxAuthPAM.c
+VBoxAuth_SOURCES.bsdsunix = pam/VBoxAuthPAM.c
 VBoxAuth_SOURCES.freebsd = pam/VBoxAuthPAM.c
 VBoxAuth_SOURCES.win = winlogon/winlogon.cpp winlogon/VBoxAuth.rc
 VBoxAuth_SOURCES.darwin = directoryservice/directoryservice.cpp
 VBoxAuth_CXXFLAGS.darwin = -Wno-deprecated-declarations
 VBoxAuth_LIBS.linux = $(LIB_RUNTIME) dl
 VBoxAuth_LIBS.solaris = $(LIB_RUNTIME) dl
+VBoxAuth_LIBS.bsdsunix = $(LIB_RUNTIME)
 VBoxAuth_LIBS.freebsd = $(LIB_RUNTIME)
 VBoxAuth_LIBS.darwin = $(LIB_RUNTIME)
 VBoxAuth_LDFLAGS.darwin = -framework DirectoryService