diff --git a/bgpd/bgp_advertise.c b/bgpd/bgp_advertise.c
index a81f288c7acc..d519749f6bca 100644
--- a/bgpd/bgp_advertise.c
+++ b/bgpd/bgp_advertise.c
@@ -182,12 +182,15 @@ void bgp_adj_in_set(struct bgp_dest *dest, struct peer *peer, struct attr *attr,
 	adj->uptime = monotime(NULL);
 	adj->addpath_rx_id = addpath_id;
 	BGP_ADJ_IN_ADD(dest, adj);
+	peer->stat_pfx_adj_rib_in++;
 	bgp_dest_lock_node(dest);
 }
 
 void bgp_adj_in_remove(struct bgp_dest **dest, struct bgp_adj_in *bai)
 {
 	bgp_attr_unintern(&bai->attr);
+	if (bai->peer)
+		bai->peer->stat_pfx_adj_rib_in--;
 	BGP_ADJ_IN_DEL(*dest, bai);
 	*dest = bgp_dest_unlock_node(*dest);
 	peer_unlock(bai->peer); /* adj_in peer reference */
diff --git a/bgpd/bgp_bmp.c b/bgpd/bgp_bmp.c
index 5fcb8c564555..d4e1f871ab6e 100644
--- a/bgpd/bgp_bmp.c
+++ b/bgpd/bgp_bmp.c
@@ -1592,6 +1592,15 @@ static void bmp_stat_put_u32(struct stream *s, size_t *cnt, uint16_t type,
 	(*cnt)++;
 }
 
+static void bmp_stat_put_u64(struct stream *s, size_t *cnt, uint16_t type,
+			     uint64_t value)
+{
+	stream_putw(s, type);
+	stream_putw(s, 8);
+	stream_putq(s, value);
+	(*cnt)++;
+}
+
 static void bmp_stats(struct event *thread)
 {
 	struct bmp_targets *bt = EVENT_ARG(thread);
@@ -1635,6 +1644,8 @@ static void bmp_stats(struct event *thread)
 				peer->stat_upd_7606);
 		bmp_stat_put_u32(s, &count, BMP_STATS_FRR_NH_INVALID,
 				peer->stat_pfx_nh_invalid);
+		bmp_stat_put_u64(s, &count, BMP_STATS_SIZE_ADJ_RIB_IN,
+				 peer->stat_pfx_adj_rib_in);
 
 		stream_putl_at(s, count_pos, count);
 
diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
index e882a181b50c..107fc8b95c04 100644
--- a/bgpd/bgpd.h
+++ b/bgpd/bgpd.h
@@ -1667,6 +1667,7 @@ struct peer {
 	uint32_t stat_pfx_nh_invalid;
 	uint32_t stat_pfx_dup_withdraw;
 	uint32_t stat_upd_7606;  /* RFC7606: treat-as-withdraw */
+	uint64_t stat_pfx_adj_rib_in; /* RFC7854 : Number of routes in Adj-RIBs-In */
 
 	/* BGP state count */
 	uint32_t established; /* Established */
diff --git a/doc/user/bmp.rst b/doc/user/bmp.rst
index 0f4683205978..c553b7c985db 100644
--- a/doc/user/bmp.rst
+++ b/doc/user/bmp.rst
@@ -23,6 +23,7 @@ The `BMP` implementation in FRR has the following properties:
   - 3: count of **prefixes** with loop in cluster id
   - 4: count of **prefixes** with loop in AS-path
   - 5: count of **prefixes** with loop in originator
+  - 7: count of **routes** in adj-rib-in
   - 11: count of updates subjected to :rfc:`7607` "treat as withdrawal"
     handling due to errors
   - 65531: *experimental* count of prefixes rejected due to invalid next-hop