diff --git a/man/systemd-oomd.service.xml b/man/systemd-oomd.service.xml
index 86c47e5b572..e87a753987a 100644
--- a/man/systemd-oomd.service.xml
+++ b/man/systemd-oomd.service.xml
@@ -60,7 +60,9 @@
Without swap, the system enters a livelocked state much more quickly and may prevent systemd-oomd
from responding in a reasonable amount of time. See
"In defence of swap: common misconceptions"
- for more details on swap.
+ for more details on swap. Any swap-based actions on systems without swap will be ignored. While
+ systemd-oomd can perform pressure-based actions on a system without swap, the pressure increases
+ will be more abrupt and may require more tuning to get the desired thresholds and behavior.
Be aware that if you intend to enable monitoring and actions on user.slice,
user-$UID.slice, or their ancestor cgroups, it is highly recommended that your programs be