diff --git a/doc/zmq.md b/doc/zmq.md
--- a/doc/zmq.md
+++ b/doc/zmq.md
@@ -66,6 +66,7 @@
 
 The socket type is PUB and the address must be a valid ZeroMQ socket
 address. The same address can be used in more than one notification.
+The same notification can be specified more than once.
 
 The option to set the PUB socket's outbound message high water mark
 (SNDHWM) may be set individually for each notification:
@@ -81,6 +82,7 @@
 For instance:
 
     $ bitcoind -zmqpubhashtx=tcp://127.0.0.1:28332 \
+               -zmqpubhashtx=tcp://192.168.1.2:28332 \
                -zmqpubrawtx=ipc:///tmp/bitcoind.tx.raw \
                -zmqpubhashtxhwm=10000