diff --git a/src/usr.sbin/ntpd/ntpd.conf.5 b/src/usr.sbin/ntpd/ntpd.conf.5
index ca000971..3e8020ba 100644
--- a/src/usr.sbin/ntpd/ntpd.conf.5
+++ b/src/usr.sbin/ntpd/ntpd.conf.5
@@ -1,4 +1,4 @@
-.\" $OpenBSD: ntpd.conf.5,v 1.23 2011/09/21 15:41:30 phessler Exp $
+.\" $OpenBSD: ntpd.conf.5,v 1.24 2012/09/20 12:43:16 patrick Exp $
 .\"
 .\" Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 .\" OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: September 21 2011 $
+.Dd $Mdocdate: September 20 2012 $
 .Dt NTPD.CONF 5
 .Os
 .Sh NAME
@@ -72,6 +72,7 @@ listen on 127.0.0.1 rtable 4
 .Op Ic correction Ar microseconds
 .Op Ic weight Ar weight-value
 .Op Ic refid Ar string
+.Op Ic stratum Ar stratum-value
 .Xc
 Specify a timedelta sensor device
 .Xr ntpd 8
@@ -124,6 +125,9 @@ For example:
 .Bd -literal -offset indent
 sensor nmea0 refid GPS
 .Ed
+.Pp
+A stratum value other than the default of 1 can be assigned using
+the stratum keyword.
 .It Xo Ic server Ar address
 .Op Ic weight Ar weight-value
 .Op Ic rtable Ar table-id
diff --git a/src/usr.sbin/ntpd/ntpd.h b/src/usr.sbin/ntpd/ntpd.h
index 5e8c242b..80ac7404 100644
--- a/src/usr.sbin/ntpd/ntpd.h
+++ b/src/usr.sbin/ntpd/ntpd.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ntpd.h,v 1.105 2011/09/21 16:38:05 phessler Exp $ */
+/*	$OpenBSD: ntpd.h,v 1.106 2012/09/20 12:43:16 patrick Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -147,6 +147,7 @@ struct ntp_sensor {
 	u_int32_t			 refid;
 	int				 sensordevid;
 	int				 correction;
+	u_int8_t			 stratum;
 	u_int8_t			 weight;
 	u_int8_t			 shift;
 };
@@ -156,6 +157,7 @@ struct ntp_conf_sensor {
 	char					*device;
 	char					*refstr;
 	int					 correction;
+	u_int8_t				 stratum;
 	u_int8_t				 weight;
 };
 
diff --git a/src/usr.sbin/ntpd/parse.y b/src/usr.sbin/ntpd/parse.y
index c2ee9df6..ee94a7b8 100644
--- a/src/usr.sbin/ntpd/parse.y
+++ b/src/usr.sbin/ntpd/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.49 2011/12/28 19:32:34 phessler Exp $ */
+/*	$OpenBSD: parse.y,v 1.50 2012/09/20 12:43:16 patrick Exp $ */
 
 /*
  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -60,6 +60,7 @@ struct ntpd_conf		*conf;
 struct opts {
 	int		weight;
 	int		correction;
+	int		stratum;
 	int		rtable;
 	char		*refstr;
 } opts;
@@ -78,7 +79,7 @@ typedef struct {
 %}
 
 %token	LISTEN ON
-%token	SERVER SERVERS SENSOR CORRECTION RTABLE REFID WEIGHT
+%token	SERVER SERVERS SENSOR CORRECTION RTABLE REFID STRATUM WEIGHT
 %token	ERROR
 %token	<v.string>		STRING
 %token	<v.number>		NUMBER
@@ -89,6 +90,7 @@ typedef struct {
 %type	<v.opts>		correction
 %type	<v.opts>		rtable
 %type	<v.opts>		refid
+%type	<v.opts>		stratum
 %type	<v.opts>		weight
 %%
 
@@ -213,6 +215,7 @@ main		: LISTEN ON address listen_opts	{
 			s->weight = $3.weight;
 			s->correction = $3.correction;
 			s->refstr = $3.refstr;
+			s->stratum = $3.stratum;
 			free($2);
 			TAILQ_INSERT_TAIL(&conf->ntp_conf_sensors, s, entry);
 		}
@@ -266,6 +269,7 @@ sensor_opts_l	: sensor_opts_l sensor_opt
 		;
 sensor_opt	: correction
 		| refid
+		| stratum
 		| weight
 		;
 
@@ -291,6 +295,16 @@ refid		: REFID STRING {
 		}
 		;
 
+stratum		: STRATUM NUMBER {
+			if ($2 < 1 || $2 > 15) {
+				yyerror("stratum must be between "
+				    "1 and 15");
+				YYERROR;
+			}
+			opts.stratum = $2;
+		}
+		;
+
 weight		: WEIGHT NUMBER	{
 			if ($2 < 1 || $2 > 10) {
 				yyerror("weight must be between 1 and 10");
@@ -315,6 +329,7 @@ opts_default(void)
 	bzero(&opts, sizeof opts);
 	opts.weight = 1;
 	opts.rtable = -1;
+	opts.stratum = 1;
 }
 
 struct keywords {
@@ -357,6 +372,7 @@ lookup(char *s)
 		{ "sensor",		SENSOR},
 		{ "server",		SERVER},
 		{ "servers",		SERVERS},
+		{ "stratum",		STRATUM},
 		{ "weight",		WEIGHT}
 	};
 	const struct keywords	*p;
diff --git a/src/usr.sbin/ntpd/sensors.c b/src/usr.sbin/ntpd/sensors.c
index 839f90ab..571b0c9e 100644
--- a/src/usr.sbin/ntpd/sensors.c
+++ b/src/usr.sbin/ntpd/sensors.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sensors.c,v 1.45 2010/04/20 20:49:36 deraadt Exp $ */
+/*	$OpenBSD: sensors.c,v 1.46 2012/09/20 12:43:16 patrick Exp $ */
 
 /*
  * Copyright (c) 2006 Henning Brauer <henning@openbsd.org>
@@ -134,6 +134,7 @@ sensor_add(int sensordev, char *dxname)
 	s->next = getmonotime();
 	s->weight = cs->weight;
 	s->correction = cs->correction;
+	s->stratum = cs->stratum - 1;
 	if ((s->device = strdup(dxname)) == NULL)
 		fatal("sensor_add strdup");
 	s->sensordevid = sensordev;
@@ -147,8 +148,9 @@ sensor_add(int sensordev, char *dxname)
 
 	TAILQ_INSERT_TAIL(&conf->ntp_sensors, s, entry);
 
-	log_debug("sensor %s added (weight %d, correction %.6f, refstr %.4s)",
-	    s->device, s->weight, s->correction / 1e6, &s->refid);
+	log_debug("sensor %s added (weight %d, correction %.6f, refstr %.4s, "
+	     "stratum %d)", s->device, s->weight, s->correction / 1e6,
+	     &s->refid, s->stratum);
 }
 
 void
@@ -204,7 +206,8 @@ sensor_query(struct ntp_sensor *s)
 	s->offsets[s->shift].good = 1;
 
 	s->offsets[s->shift].status.send_refid = s->refid;
-	s->offsets[s->shift].status.stratum = 0;	/* increased when sent out */
+	/* stratum increased when sent out */
+	s->offsets[s->shift].status.stratum = s->stratum;
 	s->offsets[s->shift].status.rootdelay = 0;
 	s->offsets[s->shift].status.rootdispersion = 0;
 	s->offsets[s->shift].status.reftime = sensor.tv.tv_sec;