diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index fffef93aa23..7a5d5cc48d2 100644
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -1629,9 +1629,16 @@
Sets a comma-separated list of IP (v4 or v6) addresses with CIDR masks
from which this peer is allowed to send incoming traffic and to
- which outgoing traffic for this peer is directed. The catch-all
- 0.0.0.0/0 may be specified for matching all IPv4 addresses, and
- ::/0 may be specified for matching all IPv6 addresses.
+ which outgoing traffic for this peer is directed.
+ The catch-all 0.0.0.0/0 may be specified for matching all IPv4 addresses,
+ and ::/0 may be specified for matching all IPv6 addresses.
+ Note that this only affects "routing inside the network interface itself",
+ as in, which wireguard peer packets with a specific destination address are sent to,
+ and what source addresses are accepted from which peer.
+ To cause packets to be sent via wireguard in first place, a route needs
+ to be added, as well - either in the [Routes] section on the
+ .network matching the wireguard interface, or outside of networkd.
+