diff --git a/textproc/docbook-to-man/Makefile b/textproc/docbook-to-man/Makefile
index 04ce9a423a6f..79395dcd90a6 100644
--- a/textproc/docbook-to-man/Makefile
+++ b/textproc/docbook-to-man/Makefile
@@ -1,40 +1,27 @@
 PORTNAME=	docbook-to-man
 PORTVERSION=	1.0
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	textproc
 MASTER_SITES=	https://www.oasis-open.org/docbook/tools/dtm/
 DISTNAME=	docbook-to-man
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	DocBook SGML DTD into nroff/troff -man macros converter
 WWW=		https://www.oasis-open.org/docbook/tools/dtm/
 
 LICENSE=	MIT
 
-RUN_DEPENDS=	docbook>0:textproc/docbook
+RUN_DEPENDS=	docbook>=0:textproc/docbook \
+		openjade>=0:textproc/openjade
 
 USES=		imake
 
 MAKE_JOBS_UNSAFE=	yes
 
-# There are two ports that satisfy the nsgmls requirement.
-# Jade is preferred, but OpenJade can be selected if needed.
-OPTIONS_DEFINE=	OPENJADE
-OPENJADE_DESC=	Use OpenJade SGML/XML/DSSSL toolkit instead of Jade
-
-OPENJADE_RUN_DEPENDS=	onsgmls:textproc/openjade
-OPENJADE_RUN_DEPENDS_OFF=	nsgmls:textproc/jade
-
 post-extract:
 	@${MV} ${WRKSRC}/Doc/instant.1 ${WRKSRC}/Instant/oinstant.man
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|%%PREFIX%%|${PREFIX}|' ${WRKSRC}/cmd/docbook-to-man.sh
 
-post-patch-OPENJADE-off:
-	@${REINPLACE_CMD} -e 's|%%NSGMLS%%|nsgmls|' ${WRKSRC}/cmd/docbook-to-man.sh
-
-post-patch-OPENJADE-on:
-	@${REINPLACE_CMD} -e 's|%%NSGMLS%%|onsgmls|' ${WRKSRC}/cmd/docbook-to-man.sh
-
 .include <bsd.port.mk>
diff --git a/textproc/docbook-to-man/files/patch-cmd__docbook-to-man.sh b/textproc/docbook-to-man/files/patch-cmd__docbook-to-man.sh
index fca24cb7fc0d..5003141911b3 100644
--- a/textproc/docbook-to-man/files/patch-cmd__docbook-to-man.sh
+++ b/textproc/docbook-to-man/files/patch-cmd__docbook-to-man.sh
@@ -1,57 +1,52 @@
 --- cmd/docbook-to-man.sh.orig	1996-06-17 03:50:30 UTC
 +++ cmd/docbook-to-man.sh
 @@ -40,9 +40,9 @@
  # ***** change the following paths if your installation of nsgmls and / or
  # ***** DocBook isn't into the default places.
  
 -ROOT=/usr/local
 -SGMLS=$ROOT/lib/sgml
 -DOCBOOK=$SGMLS/Davenport/dtd
 +ROOT=%%PREFIX%%
 +SGMLS=$ROOT/share/sgml
 +DOCBOOK=$SGMLS/docbook
  
  
  # ***** modify the following line (to "=false") if you're not using the
-@@ -51,19 +51,16 @@ DOCBOOK=$SGMLS/Davenport/dtd
- doElanPSInclude=true
- 
- 
--
- # Everything below this line should be pretty standard and not require
- # modification.
+@@ -57,13 +57,11 @@ doElanPSInclude=true
  
  #ulimit -c unlimited
  
- PARSER=nsgmls
+-PARSER=nsgmls
 -INSTANT=instant
++PARSER=onsgmls
 +INSTANT=oinstant
  INSTANT_OPT=-d
  
 -CATALOG=$DOCBOOK/docbook.cat
 -DECL=$DOCBOOK/docbook.dcl
 -#PROLOG=$DOCBOOK/docbook.prolog
 +CATALOG=$DOCBOOK/catalog
  
  error=false
  
-@@ -159,17 +156,8 @@ cat >> /tmp/dtm.$$.psinc <<\!
+@@ -159,17 +157,8 @@ cat >> /tmp/dtm.$$.psinc <<\!
  .ds f4\"
  !
  
 -
 -#if [ ! -f $PROLOG ]
 -#then	cat > $PROLOG <<!
 -#<!DOCTYPE RefEntry PUBLIC "-//Davenport//DTD DocBook V2.4.1//EN" [
 -#<!ENTITY npzwc "">
 -#]>
 -#!
 -#fi
 -
  (cat /tmp/dtm.$$.psinc;
 - $PARSER -gl -m$CATALOG $DECL $INSTANCE |
 + $PARSER -gl -c $CATALOG $INSTANCE |
  	$INSTANT $INSTANT_OPT -croff.cmap -sroff.sdata -tdocbook-to-man.ts)
  
 -rm -f /tmp/dtm.$$.psinc    
 +rm -f /tmp/dtm.$$.psinc