qmk_firmware/keyboards/45_ats/config.h

 /* 
 Copyright 2020 Alec Penland
 Copyright 2020 Garret Gartner
  
 This program is free software: you can redistribute it and/or modify 
 it under the terms of the GNU General Public License as published by 
 the Free Software Foundation, either version 2 of the License, or 
 (at your option) any later version. 
  
 This program is distributed in the hope that it will be useful, 
 but WITHOUT ANY WARRANTY; without even the implied warranty of 
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 GNU General Public License for more details. 
  
 You should have received a copy of the GNU General Public License 
 along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */ 

#pragma once

/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
#define LOCKING_SUPPORT_ENABLE

/* Locking resynchronize hack */
#define LOCKING_RESYNC_ENABLE