diff --git a/man3/getaddrinfo.3 b/man3/getaddrinfo.3
index d2a329794..0f8c0efa7 100644
--- a/man3/getaddrinfo.3
+++ b/man3/getaddrinfo.3
@@ -385,6 +385,13 @@ IPv4 address configured, and IPv6 addresses are returned
 only if the local system has at least one IPv6 address configured.
 The loopback address is not considered for this case as valid
 as a configured address.
+This flag is useful on, for example,
+IPv4-only systems, to ensure that
+.BR getaddrinfo ()
+does not return IPv6 socket addresses that would always fail in
+.BR connect (2)
+or
+.BR bind (2).
 .PP
 If
 .I hints.ai_flags