diff --git a/security/heimdal/Makefile b/security/heimdal/Makefile
index 51e1bb3f096d..c6c2ecf20279 100644
--- a/security/heimdal/Makefile
+++ b/security/heimdal/Makefile
@@ -44,6 +44,7 @@ CONFIGURE_ARGS=	--with-berkeley-db \
 		--sysconfdir="${PREFIX}/etc"
 # XXX --with-readline picks up libreadline even if found in /usr/lib.
 MAKE_ENV=	INSTALL_CATPAGES=no
+LDFLAGS+=	"-Wl,--undefined-version"
 INSTALL_TARGET=	install-strip
 .if !exists(/etc/rc.d/ipropd_master)
 USE_RC_SUBR=	ipropd_master ipropd_slave