diff --git a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
index 1c032f02c0..b9ff92f470 100644
--- a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
@@ -7,7 +7,7 @@ CHIP_VARIANT = SAMD21G18A
 CHIP_FAMILY = samd21
 
 SPI_FLASH_FILESYSTEM = 1
-EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ, GD25Q64C"
+EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ, GD25Q64C, W25Q16JVxQ"
 LONGINT_IMPL = NONE
 
 # To keep the build small