diff --git a/ports/atmel-samd/boards/sparkfun_lumidrive/mpconfigboard.mk b/ports/atmel-samd/boards/sparkfun_lumidrive/mpconfigboard.mk
index a24d08ac9f..eaaffa544f 100755
--- a/ports/atmel-samd/boards/sparkfun_lumidrive/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/sparkfun_lumidrive/mpconfigboard.mk
@@ -11,7 +11,7 @@ CHIP_VARIANT = SAMD21G18A
 CHIP_FAMILY = samd21
 
 # Make room for frozen libraries.
-CFLAGS_INLINE_LIMIT = 65
+CFLAGS_INLINE_LIMIT = 55
 
 EXTERNAL_FLASH_DEVICE_COUNT = 1
 EXTERNAL_FLASH_DEVICES = "W25Q32FV"