diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index 23aedc8d8d..d9edb6ab74 100644
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -208,7 +208,8 @@
cpu.max attribute on the unified control group hierarchy and
cpu.cfs_quota_us on legacy. For details about these control group attributes, see Control Groups v2 and sched-bwc.txt.
+ url="https://www.kernel.org/doc/Documentation/scheduler/sched-bwc.txt">sched-bwc.txt.
+ Setting CPUQuota= to an empty value unsets the quota.
Example: CPUQuota=20% ensures that the executed processes will never get more than
20% CPU time on one CPU.