Index: Makefile
===================================================================
--- Makefile	(revision 569609)
+++ Makefile	(working copy)
@@ -41,7 +41,7 @@
 
 # XXX: there are also other potentially useful options worth looking into:
 #  --disable-pps        Disable PPS API support
-OPTIONS_DEFINE=		DOCS EXAMPLES HTMLDOCS NTS USER
+OPTIONS_DEFINE=		DOCS EXAMPLES HTMLDOCS NTS SIGND USER
 OPTIONS_DEFAULT=	NETTLE NTS USER
 OPTIONS_GROUP=		SECHASH
 OPTIONS_GROUP_SECHASH=	NETTLE NSS
@@ -54,6 +54,7 @@
 NSS_DESC=	NSS-based support for more hashing algorithms
 NTS_DESC=	Support Network Time Security (NTS, uses GnuTLS & Nettle)
 SECHASH_DESC=	Support for secure hash functions
+SIGND_DESC=	Support for MS-SNTP authentication in Samba
 USER_DESC=	Run as user/group chronyd (unset: user/group ntpd)
 
 HTMLDOCS_IMPLIES=	DOCS
@@ -67,6 +68,7 @@
 NSS_CONFIGURE_OFF=		--without-nss
 NTS_LIB_DEPENDS=		libgnutls.so:security/gnutls
 NTS_CONFIGURE_OFF=		--without-gnutls
+SIGND_CONFIGURE_ON=		--enable-ntp-signd
 USER_CONFIGURE_ON=		--with-user=chronyd
 USER_CONFIGURE_OFF=		--with-user=ntpd