From 4d96e5322298c4e355b30723e4cf75bbf746addc Mon Sep 17 00:00:00 2001
From: Nick Brassel <nick@tzarc.org>
Date: Mon, 27 Dec 2021 16:36:52 +1100
Subject: [PATCH] More GPIO compilation fixes. (#15592)

---
 platforms/avr/drivers/serial.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platforms/avr/drivers/serial.c b/platforms/avr/drivers/serial.c
index 7a4e5e76e694035dc929de8bbc3b6364b3d3c70b..ab0b52afd19cb6d24b97afd2d705b9478934fd9c 100644
--- a/platforms/avr/drivers/serial.c
+++ b/platforms/avr/drivers/serial.c
@@ -16,6 +16,7 @@
 #include <util/delay.h>
 #include <stddef.h>
 #include <stdbool.h>
+#include "gpio.h"
 #include "serial.h"
 
 #ifdef SOFT_SERIAL_PIN