Index: Makefile.inc1
===================================================================
--- Makefile.inc1
+++ Makefile.inc1
@@ -732,7 +732,7 @@
 		BOOTSTRAPPING=${OSRELDATE} \
 		BWPHASE=${.TARGET:C,^_,,} \
 		SSP_CFLAGS= \
-		MK_HTML=no NO_LINT=yes MK_MAN=no \
+		MK_HTML=no NO_LINT=yes MK_MAN=no MK_MAN_UTILS=yes \
 		${HOST_TOOLS_COMMON_MAKEFLAGS} \
 		-DNO_CPU_CFLAGS MK_WARNS=no MK_CTF=no \
 		MK_CLANG_EXTRAS=no MK_CLANG_FULL=no \
Index: usr.bin/mandoc/Makefile
===================================================================
--- usr.bin/mandoc/Makefile
+++ usr.bin/mandoc/Makefile
@@ -14,6 +14,8 @@
 LINKS=	${BINDIR}/mandoc ${BINDIR}/whatis \
 	${BINDIR}/mandoc ${BINDIR}/makewhatis \
 	${BINDIR}/mandoc ${BINDIR}/apropos
+.elif defined(BOOTSTRAPPING)
+.error "MK_MAN_UTILS should be set to yes when bootstrapping"
 .endif
 
 LIBMAN_SRCS=	man.c \