diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index 19aa083cfad2..6a7a7eaa0885 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -910,6 +910,7 @@ _dtrace_provs=	dtrace_io.4 \
 		dtrace_lockstat.4 \
 		dtrace_proc.4 \
 		dtrace_sched.4 \
+		dtrace_sctp.4 \
 		dtrace_tcp.4 \
 		dtrace_udp.4
 .endif
diff --git a/share/man/man4/dtrace_sctp.4 b/share/man/man4/dtrace_sctp.4
new file mode 100644
index 000000000000..159e0ebffe26
--- /dev/null
+++ b/share/man/man4/dtrace_sctp.4
@@ -0,0 +1,131 @@
+.\" Copyright (c) 2018 Devin Teske <dteske@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd April 22, 2018
+.Dt DTRACE_SCTP 4
+.Os
+.Sh NAME
+.Nm dtrace_sctp
+.Nd a DTrace provider for tracing events related to the
+.Xr sctp 4
+protocol
+.Sh SYNOPSIS
+.Fn sctp:cwnd::init uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::ack uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::rttvar uint64_t uint64_t uint64_t uint64_t uint64_t
+.Fn sctp:cwnd::rttstep uint64_t uint64_t uint64_t uint64_t uint64_t
+.Fn sctp:cwnd::fr uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::to uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::bl uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::ecn uint32_t uint32_t uintptr_t int int
+.Fn sctp:cwnd::pd uint32_t uint32_t uintptr_t int int
+.Fn sctp:rwnd:assoc:val uint32_t uint32_t int int
+.Fn sctp:flightsize:net:val uint32_t uint32_t uintptr_t int int
+.Fn sctp:flightsize:assoc:val uint32_t uint32_t int int
+.Sh DESCRIPTION
+The DTrace
+.Nm sctp
+provider allows users to trace events in the
+.Xr sctp 4
+protocol implementation.
+This provider is similar to the
+.Xr dtrace_ip 4
+and
+.Xr dtrace_udp 4
+providers,
+but additionally contains probes corresponding to protocol events at a level
+higher than packet reception and transmission.
+.Pp
+The
+.Fn sctp:cwnd::
+probes track changes in the congestion window on a netp.
+The
+.Fn sctp:rwnd::
+probes track changes in the receiver window for an assoc.
+The
+.Fn sctp:flightsize:net:val
+probe tracks changes in the flight size on a net or assoc and the
+.Fn sctp:flightsize:assoc:val
+probe provides the total flight version.
+.Pp
+The arguments of all
+.Nm sctp
+probes except for
+.Fn sctp:cwnd::rtt*
+and
+.Fn sctp::assoc:val
+are the Vtag for this end,
+the port number of the local side,
+the pointer to
+.Dv struct sctp_nets *changing ,
+the old value of the cwnd,
+and the new value of the cwnd.
+.Pp
+The arguments of
+.Fn sctp:::val
+are similar to the above except the fourth argument is the up/down amount.
+.Pp
+The
+.Fn sctp:cwnd::rtt*
+probe arguments are a bitmap of
+.Dv Vtag << 32 | localport << 16 | remoteport ,
+a bitmap of
+.Dv obw | nbw ,
+a bitmap of
+.Dv bwrtt | newrtt ,
+.Dv flight ,
+and a bitmap of
+.Dv (cwnd << 32) | point << 16 | retval(0/1) .
+.Pp
+The
+.Fn sctp:cwnd::init
+probe fires when a remotely-initiated active SCTP open succeeds.
+At this point the new connection is in the ESTABLISHED state, and the probe
+arguments expose the headers associated with the final ACK of the four-way
+handshake.
+.\" .Sh ARGUMENTS
+.\" .Sh FILES
+.\" .Sh EXAMPLES
+.\" .Sh COMPATIBILITY
+.\" This provider has not been tested for compatiblity with the
+.\" .Nm sctp
+.\" provider in Solaris
+.\" .Pq if one exists .
+.Sh SEE ALSO
+.Xr dtrace 1 ,
+.Xr dtrace_ip 4 ,
+.Xr dtrace_udp 4 ,
+.Xr sctp 4 ,
+.Xr SDT 9
+.\" .Sh HISTORY
+.\" The
+.\" .Nm sctp
+.\" provider first appeared in
+.\" .Fx
+.\" UNKNOWN.
+.Sh AUTHORS
+This manual page was written by
+.An Devin Teske Aq Mt dteske@FreeBSD.org .