diff --git a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
index 36cb67ea57..2920879de7 100644
--- a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
@@ -9,6 +9,12 @@ EXTERNAL_FLASH_DEVICE_COUNT = 2
 EXTERNAL_FLASH_DEVICES = "W25Q64JV_IQ, GD25Q64C"
 LONGINT_IMPL = MPZ
 
+# To keep the build small
+CIRCUITPY_I2CSLAVE = 0
+CIRCUITPY_FREQUENCYIO = 0
+
+CFLAGS_INLINE_LIMIT = 55
+
 CHIP_VARIANT = SAMD21G18A
 CHIP_FAMILY = samd21
 
@@ -16,7 +22,3 @@ CHIP_FAMILY = samd21
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_BusDevice
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_LIS3DH
 FROZEN_MPY_DIRS += $(TOP)/frozen/Adafruit_CircuitPython_NeoPixel
-
-# To keep the build small
-CIRCUITPY_I2CSLAVE = 0
-CIRCUITPY_FREQUENCYIO = 0