diff --git a/textproc/refdb/Makefile b/textproc/refdb/Makefile
index f212a11a9e06..c0d41d0165ea 100644
--- a/textproc/refdb/Makefile
+++ b/textproc/refdb/Makefile
@@ -1,132 +1,133 @@
 PORTNAME=	refdb
 PORTVERSION=	0.9.9
 DISTVERSIONSUFFIX=	-1
-PORTREVISION=	11
+PORTREVISION=	12
 CATEGORIES=	textproc
 MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}-src/${PORTNAME}-src-${PORTVERSION}-1
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Bibliographic reference database
 WWW=		http://refdb.sourceforge.net/
 
-BROKEN_FreeBSD_13=	ld: error: duplicate symbol: thecommandlist
-BROKEN_FreeBSD_14=	ld: error: duplicate symbol: thecommandlist
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libexpat.so:textproc/expat2 \
 		libbtparse.so:textproc/btparse \
-		libdbi.so:databases/libdbi
+		libdbi.so:databases/libdbi \
+		libltdl.so:devel/libltdl
 
 USES=		gmake iconv readline perl5 libtool pkgconfig pathfix shebangfix
 HAS_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
 PORTDOCS=	*
 
 CFLAGS+=	-I${LOCALBASE}/include
 LIBS+=		-lm
 
 CONFIGURE_ARGS=	--with-expat-lib=${LOCALBASE}/lib \
 		--with-classpath-root=${PREFIX}/share/java/classes \
 		--with-refdb-url=http://localhost/refdb
 XMLCATMGR=	${LOCALBASE}/bin/xmlcatmgr
 
 OPTIONS_DEFINE=		DOCS CATALOG
 OPTIONS_SINGLE=		DB
 OPTIONS_SINGLE_DB=	MYSQL PGSQL SQLITE
 OPTIONS_EXCLUDE=	CATALOG		# may not be implemented correctly
 CATALOG_DESC=		Install SGML catalog
 
 OPTIONS_DEFAULT=	PGSQL
 DOCS_BUILD_DEPENDS=	xsltproc:textproc/libxslt \
 			docbook-xsl>=0:textproc/docbook-xsl
 
 SHEBANG_FILES=	${WRKSRC}/scripts/*
 
 USE_RC_SUBR=	refdbd
 
 .include <bsd.port.options.mk>
 
 .if ${PORT_OPTIONS:MMYSQL}
 USES+=		mysql
 # If libdbi-drivers has been built without MySQL driver, abort
 .if exists(${LOCALBASE}/lib/dbd) && !exists(${LOCALBASE}/lib/dbd/libdbdmysql.so)
 IGNORE=		rebuild databases/libdbi-drivers with MySQL support
 .elif !exists(${LOCALBASE}/lib/dbd)
 BUILD_DEPENDS+=	${LOCALBASE}/lib/dbd:databases/libdbi-drivers
 .endif
 CONFIGURE_ARGS+=	--with-db-server=mysql
 
 .elif ${PORT_OPTIONS:MPGSQL}
 USES+=	pgsql
 # If libdbi-drivers has been built without PostgreSQL driver, abort
 .if exists(${LOCALBASE}/lib/dbd) && !exists(${LOCALBASE}/lib/dbd/libdbdpgsql.so)
 IGNORE=		rebuild databases/libdbi-drivers with PostgreSQL support
 .elif !exists(${LOCALBASE}/lib/dbd)
 BUILD_DEPENDS+=	${LOCALBASE}/lib/dbd:databases/libdbi-drivers
 .endif
 CONFIGURE_ARGS+=	--with-db-server=pgsql
 
 .elif ${PORT_OPTIONS:MSQLITE}
 LIB_DEPENDS+=	libsqlite3.so:databases/sqlite3
 # If libdbi-drivers has been built without SQLite driver, abort
 .if exists(${LOCALBASE}/lib/dbd) && !exists(${LOCALBASE}/lib/dbd/libdbdsqlite3.so)
 IGNORE=		rebuild databases/libdbi-drivers with SQLite support
 .elif !exists(${LOCALBASE}/lib/dbd)
 BUILD_DEPENDS+=	${LOCALBASE}/lib/dbd:databases/libdbi-drivers
 .endif
 CONFIGURE_ARGS+=	--with-db-server=sqlite
 .endif
 
 .if ${PORT_OPTIONS:MDOCS}
 CONFIGURE_ARGS+=	--with-docbook-xsl=${PREFIX}/share/xsl/docbook \
 			--without-docbook-xsl-ns \
 			--without-tei-xsl \
 			--without-tei-xsl-ns
 .else
 CONFIGURE_ARGS+=	--disable-docs
 .endif
 
 .if ${PORT_OPTIONS:MCATALOG}
 RUN_DEPENDS+=	xmlcatmgr:textproc/xmlcatmgr
 .endif
 
 post-patch:
 	${REINPLACE_CMD} -e 's|$$(PACKAGE)-$$(VERSION)|refdb|g' \
 		${WRKSRC}/doc/Makefile.in
 
 post-install:
 .if ${PORT_OPTIONS:MCATALOG}
 	@[ -f ${STAGEDIR}${PREFIX}/share/sgml/catalog.ports ] || ${TOUCH} ${STAGEDIR}${PREFIX}/share/sgml/catalog.ports
 	@${XMLCATMGR} -s -c ${STAGEDIR}${PREFIX}/share/sgml/catalog.ports lookup "${STAGEDIR}${PREFIX}/share/refdb/refdb.cat" > /dev/null || ${XMLCATMGR} -s -c ${STAGEDIR}${PREFIX}/share/sgml/catalog.ports add CATALOG "${STAGEDIR}${PREFIX}/share/refdb/refdb.cat" -- > /dev/null
 .endif
 	@${ECHO_MSG} "To complete RefDB installation:"
 .if ${PORT_OPTIONS:MMYSQL}
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "1. To initialise MySQL, run the following command:"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   mysql -u root -e \"CREATE DATABASE refdb\""
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   Then, for MySQL older than 4.1, run:"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   mysql -u root refdb < ${PREFIX}/share/refdb/sql/refdb.dump.mysql"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   For MySQL 4.1 and later, run:"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   mysql -u root refdb < ${PREFIX}/share/refdb/sql/refdb.dump.mysql41"
 	@${ECHO_MSG} ""
 .elif ${PORT_OPTIONS:MPGSQL}
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "1. To initialise PostgreSQL, run the following commands:"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   createdb -U pgsql -E UNICODE refdb"
 	@${ECHO_MSG} "   psql -U pgsql refdb < ${PREFIX}/share/refdb/sql/refdb.dump.pgsql"
 	@${ECHO_MSG} ""
 .elif ${PORT_OPTIONS:MSQLITE}
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "1. To initialise SQLite, run the following commands:"
 	@${ECHO_MSG} ""
 	@${ECHO_MSG} "   cd ${PREFIX}/share/refdb/db"
 	@${ECHO_MSG} "   sqlite refdb < ${PREFIX}/share/refdb/sql/refdb.dump.sqlite"
 	@${ECHO_MSG} ""
 .endif
 
 .include <bsd.port.mk>
diff --git a/textproc/refdb/files/patch-src_readln.c b/textproc/refdb/files/patch-src_readln.c
new file mode 100644
index 000000000000..504e48c0efe8
--- /dev/null
+++ b/textproc/refdb/files/patch-src_readln.c
@@ -0,0 +1,10 @@
+--- src/readln.c.orig	2023-04-17 14:45:25 UTC
++++ src/readln.c
+@@ -27,6 +27,7 @@
+ #include "strfncs.h"
+ 
+ extern COMMAND commands[];
++COMMAND *thecommandlist;
+ 
+ /* Execute a command line. */
+ int execute_line (char *line, COMMAND *commandlist)
diff --git a/textproc/refdb/files/patch-src_readln.h b/textproc/refdb/files/patch-src_readln.h
new file mode 100644
index 000000000000..83459176434b
--- /dev/null
+++ b/textproc/refdb/files/patch-src_readln.h
@@ -0,0 +1,11 @@
+--- src/readln.h.orig	2023-04-17 14:45:07 UTC
++++ src/readln.h
+@@ -29,7 +29,7 @@ typedef struct {
+   char *doc;			/* Documentation for this function.  */
+ } COMMAND;
+ 
+-COMMAND *thecommandlist;
++extern COMMAND *thecommandlist;
+ 
+ COMMAND *find_command(char *name, COMMAND *commands);
+ int execute_line (char *line, COMMAND *commands);