From 2e235aff030887c84493b877bafe2d798fd374ed Mon Sep 17 00:00:00 2001
From: Jason Smith <jason.inet@gmail.com>
Date: Fri, 20 Dec 2019 17:14:27 -0800
Subject: [PATCH] Fix HAL_STM32 + Arduino IDE SoftwareSerial conflict (#16266)

---
 Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp b/Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp
index 2d2883f4ce..f6363aa1cf 100644
--- a/Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp
+++ b/Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp
@@ -34,7 +34,7 @@
 //
 // Includes
 //
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(PLATFORMIO) && defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
 
 #include "SoftwareSerial.h"
 #include "timers.h"