diff --git a/SRC/echoping.1 b/SRC/echoping.1
index aa1b408..d06668c 100644
--- a/SRC/echoping.1
+++ b/SRC/echoping.1
@@ -44,7 +44,9 @@ to use it (carefully) to measure Web performances.
 
 .SH ARGUMENT
 .IP hostname[:port]
-Name of the server to test. For HTTP, you can specify a port number.
+Name (or address) of the server to test. For HTTP, you can specify a
+port number. For HTTP and IPv6, you can use RFC 2732 syntax (you will
+probably need to escape the brackets from the shell).
 
 .SH OPTIONS
 .IP -v