diff --git a/etc/etc.macppc/MAKEDEV.conf b/etc/etc.macppc/MAKEDEV.conf
index d1df761b940b..5753010c3e07 100644
--- a/etc/etc.macppc/MAKEDEV.conf
+++ b/etc/etc.macppc/MAKEDEV.conf
@@ -1,4 +1,4 @@
-# $NetBSD: MAKEDEV.conf,v 1.14 2022/08/12 11:15:41 riastradh Exp $
+# $NetBSD: MAKEDEV.conf,v 1.15 2024/02/04 20:50:30 andvar Exp $
 
 all_md)
 	makedev wscons sd0 sd1 sd2 st0 st1 cd0 cd1 wd0 wd1 wd2 wd3
@@ -33,7 +33,7 @@ floppy)
 tty1[0-9])
 	# Mac uses special mapping - tty0[01] are the zstty ports,
 	# tty1? are 'com' ports; for 'com' ports, we need to start
-	# at correct offset, i.e. substract 10
+	# at correct offset, i.e. subtract 10
 	ounit=${i#tty}
 	ounit=$(($ounit + 0))
 	if [ $ounit -lt 10 ]; then
diff --git a/etc/etc.ofppc/MAKEDEV.conf b/etc/etc.ofppc/MAKEDEV.conf
index 96c801f2e95e..1562702be4d2 100644
--- a/etc/etc.ofppc/MAKEDEV.conf
+++ b/etc/etc.ofppc/MAKEDEV.conf
@@ -1,4 +1,4 @@
-# $NetBSD: MAKEDEV.conf,v 1.11 2019/01/27 08:53:29 maxv Exp $
+# $NetBSD: MAKEDEV.conf,v 1.12 2024/02/04 20:50:29 andvar Exp $
 
 all_md)
 	makedev wscons sd0 sd1 sd2 st0 st1 cd0 cd1 wd0 wd1 fd0 fd1
@@ -28,7 +28,7 @@ floppy)
 tty1[0-9])
 	# Mac uses special mapping - tty0[01] are the zstty ports,
 	# tty1? are 'com' ports; for 'com' ports, we need to start
-	# at correct offset, i.e. substract 10
+	# at correct offset, i.e. subtract 10
 	ounit=${i#tty}
 	ounit=$(($ounit + 0))
 	if [ $ounit -lt 10 ]; then
diff --git a/sys/dev/pci/mpii.c b/sys/dev/pci/mpii.c
index ddbaa10be8b5..dca92a0ca260 100644
--- a/sys/dev/pci/mpii.c
+++ b/sys/dev/pci/mpii.c
@@ -1,4 +1,4 @@
-/* $NetBSD: mpii.c,v 1.30 2023/10/25 00:21:49 buhrow Exp $ */
+/* $NetBSD: mpii.c,v 1.31 2024/02/04 20:50:30 andvar Exp $ */
 /*	$OpenBSD: mpii.c,v 1.115 2018/08/14 05:22:21 jmatthew Exp $	*/
 /*
  * Copyright (c) 2010, 2012 Mike Belopuhov
@@ -20,7 +20,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mpii.c,v 1.30 2023/10/25 00:21:49 buhrow Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mpii.c,v 1.31 2024/02/04 20:50:30 andvar Exp $");
 
 #include "bio.h"
 
@@ -3685,7 +3685,7 @@ mpii_bio_hs(struct mpii_softc *sc, struct bioc_disk *bd, int nvdsk,
 			/*
 			 * diskid comparison is based on the idea that all
 			 * disks are counted by the bio(4) in sequence, thus
-			 * substracting the number of disks in the volume
+			 * subtracting the number of disks in the volume
 			 * from the diskid yields us a "relative" hotspare
 			 * number, which is good enough for us.
 			 */
diff --git a/sys/fs/udf/udf_subr.c b/sys/fs/udf/udf_subr.c
index 1698674f2f81..ee35e10ce95b 100644
--- a/sys/fs/udf/udf_subr.c
+++ b/sys/fs/udf/udf_subr.c
@@ -1,4 +1,4 @@
-/* $NetBSD: udf_subr.c,v 1.174 2023/06/03 20:41:45 andvar Exp $ */
+/* $NetBSD: udf_subr.c,v 1.175 2024/02/04 20:50:30 andvar Exp $ */
 
 /*
  * Copyright (c) 2006, 2008 Reinoud Zandijk
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__KERNEL_RCSID(0, "$NetBSD: udf_subr.c,v 1.174 2023/06/03 20:41:45 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: udf_subr.c,v 1.175 2024/02/04 20:50:30 andvar Exp $");
 #endif /* not lint */
 
 
@@ -4919,7 +4919,7 @@ udf_dir_detach(struct udf_mount *ump, struct udf_node *dir_node,
 		refcnt = udf_rw16(udf_node->efe->link_cnt);
 	}
 #ifdef UDF_COMPLETE_DELETE
-	/* substract reference counter in attached node */
+	/* subtract reference counter in attached node */
 	refcnt -= 1;
 	if (udf_node->fe) {
 		udf_node->fe->link_cnt = udf_rw16(refcnt);
@@ -4934,7 +4934,7 @@ udf_dir_detach(struct udf_mount *ump, struct udf_node *dir_node,
 	if (fid->file_char & UDF_FILE_CHAR_DIR) {
 		int drefcnt;
 
-		/* substract reference counter in directory node */
+		/* subtract reference counter in directory node */
 		/* note subtract 2 (?) for its was also backreferenced */
 		if (dir_node->fe) {
 			drefcnt  = udf_rw16(dir_node->fe->link_cnt);