diff --git a/man7/unix.7 b/man7/unix.7
index 267d083e7..7e6495692 100644
--- a/man7/unix.7
+++ b/man7/unix.7
@@ -250,6 +250,16 @@ and
 .\" However, fchown() and fchmod() do not seem to have an effect
 .\"
 .SS Abstract sockets
+Socket permissions have no meaning for abstract sockets:
+the process
+.BR umask (2)
+has no effect when binding an abstract socket,
+and changing the ownership and permissions of the object (via
+.BR fchown (2)
+and
+.BR fchmod (2))
+has no effect on the accessibility of the socket.
+
 Abstract sockets automatically disappear when all open references
 to the socket are closed.