diff --git a/etc/defaults/rc.conf b/etc/defaults/rc.conf
index 38d55575e244..9088ebc74597 100644
--- a/etc/defaults/rc.conf
+++ b/etc/defaults/rc.conf
@@ -462,6 +462,9 @@ ldconfig_paths_aout="/usr/lib/compat/aout /usr/X11R6/lib/aout /usr/local/lib/aou
 			# a.out shared library search paths
 kern_securelevel_enable="NO"	# kernel security level (see init(8)),
 kern_securelevel="-1"	# range: -1..3 ; `-1' is the most insecure
+			# Note that setting securelevel to 0 will result
+			# in the system booting with securelevel set to 1, as
+			# init(8) will raise the level when rc(8) completes.
 update_motd="YES"	# update version info in /etc/motd (or NO)
 unaligned_print="YES"	# print unaligned access warnings on the alpha (or NO).
 entropy_file="/entropy"	# Set to NO to disable caching entropy through reboots.