diff --git a/ci/test-02-help.pl b/ci/test-02-help.pl
index ca78a40..2c70b53 100755
--- a/ci/test-02-help.pl
+++ b/ci/test-02-help.pl
@@ -29,6 +29,7 @@ ${I_HELP}   -l         loop sending pings forever
    -m         ping multiple interfaces on target host
    -M         set the Don't Fragment flag
    -n         show targets by name (-d is equivalent)
+   -N         output compatible for netdata (-l -Q are required)
    -o         show the accumulated outage time (lost packets * packet interval)
    -O n       set the type of service (tos) flag on the ICMP packets
    -p n       interval between ping packets to one target (in millisec)