diff --git a/src/modules/services-systemd/services-systemd.conf b/src/modules/services-systemd/services-systemd.conf
index ad96ca85a..1d89ca74c 100644
--- a/src/modules/services-systemd/services-systemd.conf
+++ b/src/modules/services-systemd/services-systemd.conf
@@ -3,17 +3,17 @@
 #
 # Systemd services manipulation.
 #
-# This module can enable services and targets for systemd
-# (if packaging doesn't already do that). It can calso
-# disable services (but not targets).
+# This module can enable services, timers and targets for systemd
+# (if packaging doesn't already do that). It can also
+# disable services and targets as well as mask units.
 #
-# First, services are enabled; then targets; then services
-# are disabled -- this order of operations is fixed.
+# The order of operations is fixed.  Enable services, enable targets,
+# enable timers, disable services, disable targets and finally apply masks.
 ---
 
-# There are three configuration keys for this module:
-# *services*, *targets* and *disable*. The value of each
-# key is a list of entries. Each entry has two keys:
+# There are several configuration keys for this module:
+# *services*, *targets*, *timers*, *disable*, *disable-targets* and *mask*.
+# The value of each key is a list of entries. Each entry has two keys:
 #   - *name* is the (string) name of the service or target that is being
 #     changed. Use quotes. Don't include ".target" or ".service"
 #     in the name.