diff --git a/share/man/man4/man4.riscv64/Makefile b/share/man/man4/man4.riscv64/Makefile
index f45bf471dc9..684d9a6dc6e 100644
--- a/share/man/man4/man4.riscv64/Makefile
+++ b/share/man/man4/man4.riscv64/Makefile
@@ -1,8 +1,8 @@
-#	$OpenBSD: Makefile,v 1.14 2026/04/06 10:42:12 kettenis Exp $
+#	$OpenBSD: Makefile,v 1.15 2026/04/06 10:46:13 kettenis Exp $
 
 MAN=	intro.4 mpfclock.4 mpfgpio.4 mpfiic.4 plic.4 \
 	sfcc.4 sfclock.4 sfgpio.4 sfuart.4 sgmsi.4 \
-	smtclock.4 smtgpio.4 \
+	smtclock.4 smtgpio.4 smtiic.4 \
 	stfclock.4 stfpcie.4 stfpciephy.4 stfpinctrl.4 stfrng.4
 
 MANSUBDIR=riscv64
diff --git a/share/man/man4/man4.riscv64/smtiic.4 b/share/man/man4/man4.riscv64/smtiic.4
new file mode 100644
index 00000000000..011810f3983
--- /dev/null
+++ b/share/man/man4/man4.riscv64/smtiic.4
@@ -0,0 +1,47 @@
+.\"	$OpenBSD: smtiic.4,v 1.1 2026/04/06 10:46:13 kettenis Exp $
+.\"
+.\" Copyright (c) 2026 Mark Kettenis <kettenis@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: April 6 2026 $
+.Dt SMTIIC 4 riscv64
+.Os
+.Sh NAME
+.Nm smtiic
+.Nd SpacemiT I2C controller
+.Sh SYNOPSIS
+.Cd "smtiic* at fdt?"
+.Cd "iic* at smtiic?"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports the SpacemiT I2C controller for use with the
+.Xr iic 4
+framework.
+.Sh SEE ALSO
+.Xr iic 4 ,
+.Xr intro 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 7.9 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Patrick Wildt Aq Mt patrick@blueri.se
+and
+.An Mark Kettenis Aq Mt kettenis@openbsd.org .