--- /etc/defaults/rc.conf.orig	2015-12-02 16:00:12.000000000 +0100
+++ /etc/defaults/rc.conf	2016-03-13 19:09:16.000000000 +0100
@@ -99,6 +99,9 @@
 			# partitions and don't want to be warned about it.
 swapoff=YES		# Remove block-type swap partitions upon shutdown
 			# This defaults to yes, so that raids shutdown cleanly
+swap_backed_tmpfs=ALL	# Set to a list of tmpfs filesystems to be unmounted
+			# before removing block-type swap partitions, or ALL
+			# to remove all tmpfs filesystems.
 
 # Concatenated disk driver.
 #