diff --git a/ports/nordic/boards/particle_boron/mpconfigboard.mk b/ports/nordic/boards/particle_boron/mpconfigboard.mk
index 26fe7b83db604..e0ee123c99a90 100644
--- a/ports/nordic/boards/particle_boron/mpconfigboard.mk
+++ b/ports/nordic/boards/particle_boron/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "Particle"
 MCU_CHIP = nrf52840
 
 QSPI_FLASH_FILESYSTEM = 1
-EXTERNAL_FLASH_DEVICES = "MX25L3233F"
+EXTERNAL_FLASH_DEVICES = "MX25L3233F,MX25R6435F"