1 files changed, 6 insertions, 1 deletions

diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index 4eff764e2..d3fbe2d87 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -148,6 +148,11 @@ bool is_keyboard_master(void) {
  */
 void keyboard_init(void) {
     timer_init();
+// To use PORTF disable JTAG with writing JTD bit twice within four cycles.
+#if  (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
+  MCUCR |= _BV(JTD);
+  MCUCR |= _BV(JTD);
+#endif
     matrix_init();
 #ifdef PS2_MOUSE_ENABLE
     ps2_mouse_init();
@@ -185,7 +190,7 @@ void keyboard_init(void) {
 
 /** \brief Keyboard task: Do keyboard routine jobs
  *
- * Do routine keyboard jobs: 
+ * Do routine keyboard jobs:
  *
  * * scan matrix
  * * handle mouse movements