diff --git a/libraries/AP_HAL_ChibiOS/hwdef/KakuteF4/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/KakuteF4/hwdef-bl.dat
index 8650462ee6..3ac5a1c4fd 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/KakuteF4/hwdef-bl.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/KakuteF4/hwdef-bl.dat
@@ -19,7 +19,7 @@ PB5 LED_BOOTLOADER OUTPUT LOW
 define HAL_LED_ON 0
 
 # Avoid buzzer scream
-PD15 BUZZER OUTPUT LOW PULLDOWN
+PC9 BUZZER OUTPUT LOW PULLDOWN
 
 # the location where the bootloader will put the firmware
 FLASH_BOOTLOADER_LOAD_KB 64