diff --git a/pkgtools/bootstrap-mk-files/files/bsd.man.mk b/pkgtools/bootstrap-mk-files/files/bsd.man.mk
index cb28ef8a4..af2e1d638 100644
--- a/pkgtools/bootstrap-mk-files/files/bsd.man.mk
+++ b/pkgtools/bootstrap-mk-files/files/bsd.man.mk
@@ -25,7 +25,8 @@ CATDEPS?=	${TMACDIR}/tmac.andoc \
 		${TMACDIR}/tmac.doc
 .endif
 MANTARGET?=	cat
-NROFF?=		nroff -Tascii
+# LSC: On MINIX our current nroff doesn't support -Tascii
+NROFF?=		mandoc -Tascii
 GROFF?=		groff -Tascii
 TBL?=		tbl
 
diff --git a/pkgtools/bootstrap-mk-files/files/mods/NetBSD.bsd.man.mk b/pkgtools/bootstrap-mk-files/files/mods/NetBSD.bsd.man.mk
index b2b464f9d..d54d30b88 100644
--- a/pkgtools/bootstrap-mk-files/files/mods/NetBSD.bsd.man.mk
+++ b/pkgtools/bootstrap-mk-files/files/mods/NetBSD.bsd.man.mk
@@ -30,7 +30,8 @@ CATDEPS?=	${TMACDIR}/andoc.tmac ${TMACDIR}/doc.tmac
 .endif
 
 MANTARGET?=	cat
-NROFF?=		nroff -Tascii
+# LSC: On MINIX our current nroff doesn't support -Tascii
+NROFF?=		mandoc -Tascii
 GROFF?=		groff -Tascii
 TBL?=		tbl