Index: head/sys/conf/config.mk
===================================================================
--- head/sys/conf/config.mk
+++ head/sys/conf/config.mk
@@ -8,6 +8,10 @@
 # the code here when they all produce identical results
 # (or should)
 .if !defined(KERNBUILDDIR)
+opt_global.h:
+.if ${MACHINE} != "mips"
+	@echo "#define VIMAGE 1" > ${.TARGET}
+.endif
 opt_bpf.h:
 	echo "#define DEV_BPF 1" > ${.TARGET}
 .if ${MK_INET_SUPPORT} != "no"
Index: head/sys/conf/kmod.mk
===================================================================
--- head/sys/conf/kmod.mk
+++ head/sys/conf/kmod.mk
@@ -106,6 +106,9 @@
 CFLAGS:=	${CFLAGS:N-I*} ${NOSTDINC} ${INCLMAGIC} ${CFLAGS:M-I*}
 .if defined(KERNBUILDDIR)
 CFLAGS+=	-DHAVE_KERNEL_OPTION_HEADERS -include ${KERNBUILDDIR}/opt_global.h
+.else
+SRCS+=		opt_global.h
+CFLAGS+=	-include ${.OBJDIR}/opt_global.h
 .endif
 
 # Add -I paths for system headers.  Individual module makefiles don't