diff --git a/sbin/mknod/mknod.8 b/sbin/mknod/mknod.8
index 52ae02dbee4..bbfd073c812 100644
--- a/sbin/mknod/mknod.8
+++ b/sbin/mknod/mknod.8
@@ -91,8 +91,9 @@ a subunit may be a filesystem partition
 or a tty line.
 .El
 .Pp
-Major and minor device numbers can be given using the normal C
-notation, so that a leading
+Major and minor device numbers can be given in any format acceptable to
+.Xr strtoul 3 ,
+so that a leading
 .Ql 0x
 indicates a hexadecimal number, and a leading
 .Ql 0