diff --git a/ports/mimxrt/boards/MIMXRT1064_EVK/mpconfigboard.mk b/ports/mimxrt/boards/MIMXRT1064_EVK/mpconfigboard.mk
index 08696d72ff..b0bd7ec6ac 100644
--- a/ports/mimxrt/boards/MIMXRT1064_EVK/mpconfigboard.mk
+++ b/ports/mimxrt/boards/MIMXRT1064_EVK/mpconfigboard.mk
@@ -3,8 +3,8 @@ MCU_VARIANT = MIMXRT1064DVL6A
 
 MICROPY_FLOAT_IMPL = double
 MICROPY_PY_MACHINE_SDCARD = 1
-MICROPY_HW_FLASH_TYPE = qspi_hyper_flash
-MICROPY_HW_FLASH_SIZE = 0x4000000  # 64MB
+MICROPY_HW_FLASH_TYPE = internal
+MICROPY_HW_FLASH_SIZE = 0x400000  # 4MB
 
 MICROPY_HW_SDRAM_AVAIL = 1
 MICROPY_HW_SDRAM_SIZE  = 0x2000000  # 32MB