diff --git a/sndiod/sndiod.1 b/sndiod/sndiod.1
index 5782f73..4f1c035 100644
--- a/sndiod/sndiod.1
+++ b/sndiod/sndiod.1
@@ -228,6 +228,9 @@ If the option argument is
 then
 .Nm
 will accept connections from any address.
+As the communication is not secure, this
+option is only suitable for local networks where all hosts
+and users are trusted.
 .It Fl m Ar mode
 Set the sub-device mode.
 Valid modes are