diff --git a/sys/boot/forth/loader.conf b/sys/boot/forth/loader.conf
index 9b0c9cd927e5..dedfa62e0ccf 100644
--- a/sys/boot/forth/loader.conf
+++ b/sys/boot/forth/loader.conf
@@ -47,7 +47,7 @@ loader_color="NO"		# Set this to YES to enable splash screen colors
 				# allowed to interrupt autoboot process and
 				# escape to the loader prompt
 #beastie_disable="NO"		# Turn the beastie boot menu on and off
-#console="vidconsole"		# Set the current console
+#console="vidconsole"		# A comma separated list of console(s)
 #currdev="disk1s1a"		# Set the current device
 module_path="/boot/modules"	# Set the module search path
 #prompt="\\${interpret}"	# Set the command prompt
@@ -59,16 +59,18 @@ module_path="/boot/modules"	# Set the module search path
 ###  Kernel settings  ########################################
 ##############################################################
 
-			# The following boot_ variables are enabled
-			# by setting them to any value.
-#boot_askname=""	# Prompt the user for the name of the root device
-#boot_cdrom=""		# Attempt to mount root file system from CD-ROM
-#boot_ddb=""		# Instructs the kernel to start in the DDB debugger
-#boot_gdb=""		# Selects gdb-remote mode for the kernel debugger
-#boot_multicons=""	# Use multiple consoles
-#boot_serial=""		# Use serial console
-#boot_single=""		# Start system in single-user mode
-#boot_verbose=""	# Causes extra debugging information to be printed
+# The following boot_ variables are enabled by setting them to any value.
+# Their presence in the kernel environment (see kenv(1)) has the same
+# effect as setting the given boot flag (see boot(8)).
+
+#boot_askname=""	# -a: Prompt the user for the name of the root device
+#boot_cdrom=""		# -C: Attempt to mount root file system from CD-ROM
+#boot_ddb=""		# -d: Instructs the kernel to start in the DDB debugger
+#boot_gdb=""		# -g: Selects gdb-remote mode for the kernel debugger
+#boot_multicons=""	# -D: Use multiple consoles
+#boot_serial=""		# -h: Use serial console
+#boot_single=""		# -s: Start system in single-user mode
+#boot_verbose=""	# -v: Causes extra debugging information to be printed
 #init_path="/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall"
 			# Sets the list of init candidates