diff --git a/etc/rc.conf.FreeBSD b/etc/rc.conf.FreeBSD
index ed5b2159..6c48ae7a 100644
--- a/etc/rc.conf.FreeBSD
+++ b/etc/rc.conf.FreeBSD
@@ -2,10 +2,10 @@
 # ""        - nothing special
 # "jail"    - FreeBSD jails
 # "prefix"  - Prefix
-# If unset, the old automagic detection code will be triggered. Said old code
-# is deprecated and will be removed not later than 2011/03/01.
+# If this is commented out, automatic detection will be attempted.
+# Note that automatic detection does not work in a prefix environment.
 #
-# This should be set to the value representing what environment this file is
-# PRESENTLY in, not what virtualization the environment is capable of.
+# This should be set to the value representing the environment this file is
+# PRESENTLY in, not the virtualization the environment is capable of.
 rc_sys="@RC_SYS_DEFAULT@"
 
diff --git a/etc/rc.conf.Linux b/etc/rc.conf.Linux
index 9632a75c..9a6e1ab2 100644
--- a/etc/rc.conf.Linux
+++ b/etc/rc.conf.Linux
@@ -7,11 +7,12 @@
 # "vserver" - Linux vserver
 # "xen0"    - Xen0 Domain
 # "xenU"    - XenU Domain
-# If unset, the old automagic detection code will be triggered. Said old code
-# is deprecated and will be removed not later than 2011/03/01.
+# If this is commented out, automatic detection will be attempted.
+# Note that autodetection will not work in a prefix environment or in a
+# linux container.
 #
-# This should be set to the value representing what environment this file is
-# PRESENTLY in, not what virtualization the environment is capable of.
+# This should be set to the value representing the environment this file is
+# PRESENTLY in, not the virtualization the environment is capable of.
 rc_sys="@RC_SYS_DEFAULT@"
 
 ##############################################################################
diff --git a/etc/rc.conf.NetBSD b/etc/rc.conf.NetBSD
index c49a9abe..12d61bf4 100644
--- a/etc/rc.conf.NetBSD
+++ b/etc/rc.conf.NetBSD
@@ -3,10 +3,10 @@
 # "prefix"  - Prefix
 # "xen0"    - Xen0 Domain
 # "xenU"    - XenU Domain
-# If unset, the old automagic detection code will be triggered. Said old code
-# is deprecated and will be removed not later than 2011/03/01.
+# If this is commented out, automatic detection will be attempted.
+# Note that automatic detection does not work in a prefix environment.
 #
-# This should be set to the value representing what environment this file is
-# PRESENTLY in, not what virtualization the environment is capable of.
+# This should be set to the value representing the environment this file is
+# PRESENTLY in, not the virtualization the environment is capable of.
 rc_sys="@RC_SYS_DEFAULT@"