RHEL 7.3 - Resolving the leap second issue

I ran the leap second detector script as instructed (https://access.redhat.com/labs/leapsecond) to check if the system is affected :

$ ./leap_second_issue_detector.sh

[INFORMATION]

- Installed kernel version: 3.10.0-514.el7.x86_64

After the leap second, this system will have a time which is different from the true/official time.

If that is not desired, consult  for details on configuring the system.

Then I added the following lines to the

/etc/chrony.conf

# Step leap second

leapsecmode step

After rebooting the system I ran the script again, but nothing has changed, it still gives me the same information as shown above.

Did I miss something or did I misunderstand the instructions somehow ? What has to be done to solve the leap second problem ?