Depreciated function set_cookie()

[noor8380]

Deprecated function set_cookie() called in system/expressionengine/third_party/flag_master/libraries/Flag_master_flags.php on line 523.
From template tag exp:flag_master:simple_form in classifieds/details.
Deprecated since 2.8. Use EE_Input::set_cookie() instead.

Deprecated function set_cookie() called in system/expressionengine/third_party/flag_master/libraries/Flag_master_flags.php on line 517.
From template tag exp:flag_master:simple_form in classifieds/details.
Deprecated since 2.8. Use EE_Input::set_cookie() instead.

[noor8380]

How can we fix this?