diff --git a/DBus-service.md b/DBus-service.md
index 55d4658..3e438c7 100644
--- a/DBus-service.md
+++ b/DBus-service.md
@@ -38,6 +38,8 @@ Example with `dbus-send`:
 
     dbus-send --session --type=method_call --print-reply --dest="org.asamk.Signal" /org/asamk/Signal org.asamk.Signal.sendMessage string:MessageText array:string: string:RECIPIENT
 
+Keep in mind that if you use DBus as a system service and want to send a message using the dbus daemon, you must use `--system` instead of `--session` in the dbus send command.
+
 For an example of sending a group message through the dbus interface, see [#272](https://github.com/AsamK/signal-cli/issues/272).