Index: sys/netinet/tcp_input.c
===================================================================
--- sys/netinet/tcp_input.c
+++ sys/netinet/tcp_input.c
@@ -2655,7 +2655,7 @@
 					 * snd_cwnd after packet transmission.
 					 */
 					cc_ack_received(tp, th, CC_DUPACK);
-					u_long oldcwnd = tp->snd_cwnd;
+					uint32_t oldcwnd = tp->snd_cwnd;
 					tcp_seq oldsndmax = tp->snd_max;
 					u_int sent;
 					int avail;
@@ -3821,7 +3821,7 @@
 tcp_newreno_partial_ack(struct tcpcb *tp, struct tcphdr *th)
 {
 	tcp_seq onxt = tp->snd_nxt;
-	u_long ocwnd = tp->snd_cwnd;
+	uint32_t ocwnd = tp->snd_cwnd;
 	u_int maxseg = tcp_maxseg(tp);
 
 	INP_WLOCK_ASSERT(tp->t_inpcb);
Index: sys/netinet/tcp_stacks/fastpath.c
===================================================================
--- sys/netinet/tcp_stacks/fastpath.c
+++ sys/netinet/tcp_stacks/fastpath.c
@@ -1170,7 +1170,7 @@
 					 * snd_cwnd after packet transmission.
 					 */
 					cc_ack_received(tp, th, CC_DUPACK);
-					u_long oldcwnd = tp->snd_cwnd;
+					uint32_t oldcwnd = tp->snd_cwnd;
 					tcp_seq oldsndmax = tp->snd_max;
 					u_int sent;
 					int avail;
Index: sys/netinet/tcp_usrreq.c
===================================================================
--- sys/netinet/tcp_usrreq.c
+++ sys/netinet/tcp_usrreq.c
@@ -2225,7 +2225,7 @@
 	    tp->rcv_adv, tp->rcv_wnd, tp->rcv_up);
 
 	db_print_indent(indent);
-	db_printf("snd_wnd: %u   snd_cwnd: %lu\n",
+	db_printf("snd_wnd: %u   snd_cwnd: %u\n",
 	   tp->snd_wnd, tp->snd_cwnd);
 
 	db_print_indent(indent);
@@ -2268,7 +2268,7 @@
 
 	db_print_indent(indent);
 	db_printf("ts_offset: %u   last_ack_sent: 0x%08x   snd_cwnd_prev: "
-	    "%lu\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev);
+	    "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev);
 
 	db_print_indent(indent);
 	db_printf("snd_ssthresh_prev: %lu   snd_recover_prev: 0x%08x   "
Index: sys/netinet/tcp_var.h
===================================================================
--- sys/netinet/tcp_var.h
+++ sys/netinet/tcp_var.h
@@ -183,7 +183,7 @@
 	tcp_seq	rcv_up;			/* receive urgent pointer */
 
 	uint32_t  snd_wnd;		/* send window */
-	u_long	snd_cwnd;		/* congestion-controlled window */
+	uint32_t  snd_cwnd;		/* congestion-controlled window */
 	u_long	snd_spare1;		/* unused */
 	u_long	snd_ssthresh;		/* snd_cwnd size threshold for
 					 * for slow start exponential to
@@ -226,7 +226,7 @@
 
 	tcp_seq	last_ack_sent;
 /* experimental */
-	u_long	snd_cwnd_prev;		/* cwnd prior to retransmit */
+	uint32_t  snd_cwnd_prev;	/* cwnd prior to retransmit */
 	u_long	snd_ssthresh_prev;	/* ssthresh prior to retransmit */
 	tcp_seq	snd_recover_prev;	/* snd_recover prior to retransmit */
 	int	t_sndzerowin;		/* zero-window updates sent */