From 36ef9327efd339f925ef0de07801fd0a4a42e59b Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Tue, 28 Jul 2020 03:10:00 -0500
Subject: [PATCH] Keep -std=gnu++11 in stm32 build_unflags

---
 platformio.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index f60ebcce35..24d416444f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -380,7 +380,7 @@ src_filter    = ${common.default_src_filter} +<src/HAL/STM32>
 platform      = ${common_stm32.platform}
 build_flags   = !python Marlin/src/HAL/STM32F1/build_flags.py
   ${common.build_flags} -std=gnu++14 -DHAVE_SW_SERIAL
-build_unflags = -std=gnu11
+build_unflags = -std=gnu11 -std=gnu++11
 src_filter    = ${common.default_src_filter} +<src/HAL/STM32F1>
 lib_ignore    = SPI
 lib_deps      = ${common.lib_deps}