diff --git a/plugins/lxc/README b/plugins/lxc/README
index 941ff402..ff81420f 100644
--- a/plugins/lxc/README
+++ b/plugins/lxc/README
@@ -1,5 +1,7 @@
-This works for lxc 3 (and, also, if you the two special cases in
-lxc-lib, namely lxc-cgroup and lxc-netdev, you can support lxc < 3 too.
+This works for lxc 3 (and lxc 2, as long as you don't have
+cruft in your config file, test it with:
+   lxc-cgroup -o /dev/stdout -l INFO -n 104 cpuacct.usage
+-- with 104 a valid lxc instance)
 
 Tested on Debian buster and Debian jessie.