diff --git a/sys/netinet/libalias/alias_sctp.c b/sys/netinet/libalias/alias_sctp.c
--- a/sys/netinet/libalias/alias_sctp.c
+++ b/sys/netinet/libalias/alias_sctp.c
@@ -1952,7 +1952,7 @@
 				RmGlobalIPAddresses(sm, assoc, direction);
 				break;
 			}
-		/* fall through to default */
+		/* FALLTHROUGH */
 	default:
 		sctp_ResetTimeOut(la,assoc, SN_U_T(la));
 		return (SN_NAT_PKT);  /* forward packet */
diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c
--- a/sys/netinet/sctp_output.c
+++ b/sys/netinet/sctp_output.c
@@ -5041,7 +5041,7 @@
 			break;
 		case SCTP_HAS_NAT_SUPPORT:
 			*nat_friendly = 1;
-			/* fall through */
+			/* FALLTHROUGH */
 		case SCTP_PRSCTP_SUPPORTED:
 			if (padded_size != sizeof(struct sctp_paramhdr)) {
 				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
diff --git a/sys/netinet/tcp_ecn.c b/sys/netinet/tcp_ecn.c
--- a/sys/netinet/tcp_ecn.c
+++ b/sys/netinet/tcp_ecn.c
@@ -318,10 +318,10 @@
 				switch (tcp_ecn_get_ace(thflags)) {
 				case 0b010:
 					/* nonECT SYN or SYN,ACK */
-					/* Fallthrough */
+					/* FALLTHROUGH */
 				case 0b011:
 					/* ECT1 SYN or SYN,ACK */
-					/* Fallthrough */
+					/* FALLTHROUGH */
 				case 0b100:
 					/* ECT0 SYN or SYN,ACK */
 					tp->t_scep = 5;
@@ -467,9 +467,9 @@
 			tp->t_flags2 |= TF2_ECN_PERMIT;
 			break;
 		case SCF_ACE_N:
-			/* Fallthrough */
+			/* FALLTHROUGH */
 		case SCF_ACE_0:
-			/* Fallthrough */
+			/* FALLTHROUGH */
 		case SCF_ACE_1:
 			tp->t_flags2 |= TF2_ACE_PERMIT;
 			tp->t_scep = 5;
diff --git a/sys/netinet/tcp_log_buf.c b/sys/netinet/tcp_log_buf.c
--- a/sys/netinet/tcp_log_buf.c
+++ b/sys/netinet/tcp_log_buf.c
@@ -1928,7 +1928,7 @@
 	case TCP_LOG_STATE_CLEAR:
 		while ((log_entry = STAILQ_FIRST(&tp->t_logs)) != NULL)
 			tcp_log_remove_log_head(tp, log_entry);
-		/* Fall through */
+		/* FALLTHROUGH */
 
 	case TCP_LOG_STATE_OFF:
 		tp->_t_logstate = TCP_LOG_STATE_OFF;
diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c
--- a/sys/netinet/tcp_stacks/bbr.c
+++ b/sys/netinet/tcp_stacks/bbr.c
@@ -13807,7 +13807,7 @@
 			}
 		case EPERM:
 			tp->t_softerror = error;
-			/* Fall through */
+			/* FALLTHROUGH */
 		case EHOSTDOWN:
 		case EHOSTUNREACH:
 		case ENETDOWN: