diff --git a/platformio.ini b/platformio.ini
index d01ddb7981..1735fe83c0 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -486,6 +486,7 @@ lib_ignore    = Adafruit NeoPixel, SPI
 [env:mks_robin_nano]
 platform      = ststm32
 board         = genericSTM32F103VE
+board_build.core = maple
 platform_packages = tool-stm32duino
 build_flags   = !python Marlin/src/HAL/STM32F1/build_flags.py
   ${common.build_flags} -std=gnu++14 -DHAVE_SW_SERIAL -DSS_TIMER=4