diff --git a/src/superio/ite/it8712f/early_serial.c b/src/superio/ite/it8712f/early_serial.c
index d678f3faba..1317248f1b 100644
--- a/src/superio/ite/it8712f/early_serial.c
+++ b/src/superio/ite/it8712f/early_serial.c
@@ -74,10 +74,3 @@ void it8712f_enable_3vsbsw(void)
 	it8712f_sio_write(IT8712F_GPIO, IT8712F_CONFIG_REG_MFC, 0x80);
 	it8712f_exit_conf();
 }
-
-void it8712f_kill_watchdog(void)
-{
-	it8712f_enter_conf();
-	it8712f_sio_write(IT8712F_GPIO, IT8712F_CONFIG_REG_WATCHDOG, 0x00);
-	it8712f_exit_conf();
-}
diff --git a/src/superio/ite/it8712f/it8712f.h b/src/superio/ite/it8712f/it8712f.h
index b40e473c10..8ff528d8ad 100644
--- a/src/superio/ite/it8712f/it8712f.h
+++ b/src/superio/ite/it8712f/it8712f.h
@@ -35,7 +35,6 @@
 #define IT8712F_GAME 0x09 /* GAME port */
 #define IT8712F_IR   0x0a /* Consumer IR */
 
-void it8712f_kill_watchdog(void);
 void it8712f_enable_3vsbsw(void);
 
 #endif /* SUPERIO_ITE_IT8712F_H */