diff --git a/ports/nrf/boards/challenger_840/mpconfigboard.mk b/ports/nrf/boards/challenger_840/mpconfigboard.mk
index a72bd34857..61af9ac029 100644
--- a/ports/nrf/boards/challenger_840/mpconfigboard.mk
+++ b/ports/nrf/boards/challenger_840/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "Invector Labs AB"
 MCU_CHIP = nrf52840
 
 SPI_FLASH_FILESYSTEM = 1
-EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
+EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ,W25Q32FV"