diff --git a/share/man/man4/siftr.4 b/share/man/man4/siftr.4
index d26aaec340ea..d06d0bf89e80 100644
--- a/share/man/man4/siftr.4
+++ b/share/man/man4/siftr.4
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 7, 2019
+.Dd April 7, 2022
 .Dt SIFTR 4
 .Os
 .Sh NAME
@@ -209,7 +209,7 @@ TCP/IP packet.
 The data is CSV formatted.
 .Bd -literal -offset indent
 o,0xbec491a5,1238556193.463551,172.16.7.28,22,172.16.2.5,55931, \\
-1073725440,172312,6144,66560,66608,8,1,4,1448,936,1,996,255, \\
+1073725440,172312,34,66560,66608,8,1,4,1448,936,1,996,255, \\
 33304,208,66608,0,208,0
 .Ed
 .Pp
@@ -262,7 +262,7 @@ The current congestion window for the flow, in bytes.
 .El
 .Bl -tag -offset indent -width Va
 .It Va 10
-The current bandwidth-controlled window for the flow, in bytes.
+The current state of the t_flags2 field for the flow.
 .El
 .Bl -tag -offset indent -width Va
 .It Va 11
diff --git a/sys/netinet/siftr.c b/sys/netinet/siftr.c
index 00a4f477ad2e..1b675b8afe23 100644
--- a/sys/netinet/siftr.c
+++ b/sys/netinet/siftr.c
@@ -132,7 +132,7 @@ __FBSDID("$FreeBSD$");
  * Hard upper limit on the length of log messages. Bump this up if you add new
  * data fields such that the line length could exceed the below value.
  */
-#define MAX_LOG_MSG_LEN 200
+#define MAX_LOG_MSG_LEN 300
 /* XXX: Make this a sysctl tunable. */
 #define SIFTR_ALQ_BUFLEN (1000*MAX_LOG_MSG_LEN)
 
@@ -194,15 +194,15 @@ struct pkt_node {
 	/* Foreign TCP port. */
 	uint16_t		tcp_foreignport;
 	/* Congestion Window (bytes). */
-	u_long			snd_cwnd;
+	uint32_t		snd_cwnd;
 	/* Sending Window (bytes). */
-	u_long			snd_wnd;
+	uint32_t		snd_wnd;
 	/* Receive Window (bytes). */
-	u_long			rcv_wnd;
-	/* Unused (was: Bandwidth Controlled Window (bytes)). */
-	u_long			snd_bwnd;
+	uint32_t		rcv_wnd;
+	/* More tcpcb flags storage */
+	uint32_t		t_flags2;
 	/* Slow Start Threshold (bytes). */
-	u_long			snd_ssthresh;
+	uint32_t		snd_ssthresh;
 	/* Current state of the TCP FSM. */
 	int			conn_state;
 	/* Max Segment Size (bytes). */
@@ -455,7 +455,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
 		log_buf->ae_bytesused = snprintf(log_buf->ae_data,
 		    MAX_LOG_MSG_LEN,
 		    "%c,0x%08x,%zd.%06ld,%x:%x:%x:%x:%x:%x:%x:%x,%u,%x:%x:%x:"
-		    "%x:%x:%x:%x:%x,%u,%ld,%ld,%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,"
+		    "%x:%x:%x:%x:%x,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,"
 		    "%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
 		    direction[pkt_node->direction],
 		    pkt_node->hash,
@@ -481,7 +481,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
 		    ntohs(pkt_node->tcp_foreignport),
 		    pkt_node->snd_ssthresh,
 		    pkt_node->snd_cwnd,
-		    pkt_node->snd_bwnd,
+		    pkt_node->t_flags2,
 		    pkt_node->snd_wnd,
 		    pkt_node->rcv_wnd,
 		    pkt_node->snd_scale,
@@ -514,8 +514,8 @@ siftr_process_pkt(struct pkt_node * pkt_node)
 		/* Construct an IPv4 log message. */
 		log_buf->ae_bytesused = snprintf(log_buf->ae_data,
 		    MAX_LOG_MSG_LEN,
-		    "%c,0x%08x,%jd.%06ld,%u.%u.%u.%u,%u,%u.%u.%u.%u,%u,%ld,%ld,"
-		    "%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
+		    "%c,0x%08x,%jd.%06ld,%u.%u.%u.%u,%u,%u.%u.%u.%u,%u,%u,%u,"
+		    "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
 		    direction[pkt_node->direction],
 		    pkt_node->hash,
 		    (intmax_t)pkt_node->tval.tv_sec,
@@ -532,7 +532,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
 		    ntohs(pkt_node->tcp_foreignport),
 		    pkt_node->snd_ssthresh,
 		    pkt_node->snd_cwnd,
-		    pkt_node->snd_bwnd,
+		    pkt_node->t_flags2,
 		    pkt_node->snd_wnd,
 		    pkt_node->rcv_wnd,
 		    pkt_node->snd_scale,
@@ -782,7 +782,7 @@ siftr_siftdata(struct pkt_node *pn, struct inpcb *inp, struct tcpcb *tp,
 	pn->snd_cwnd = tp->snd_cwnd;
 	pn->snd_wnd = tp->snd_wnd;
 	pn->rcv_wnd = tp->rcv_wnd;
-	pn->snd_bwnd = 0;		/* Unused, kept for compat. */
+	pn->t_flags2 = tp->t_flags2;
 	pn->snd_ssthresh = tp->snd_ssthresh;
 	pn->snd_scale = tp->snd_scale;
 	pn->rcv_scale = tp->rcv_scale;