diff --git a/ports/atmel-samd/boards/mini_sam_m4_g18/mpconfigboard.mk b/ports/atmel-samd/boards/mini_sam_m4_g18/mpconfigboard.mk
new file mode 100644
index 0000000000..eeba0c805f
--- /dev/null
+++ b/ports/atmel-samd/boards/mini_sam_m4_g18/mpconfigboard.mk
@@ -0,0 +1,11 @@
+LD_FILE = boards/samd51x18-bootloader-external-flash.ld
+USB_VID = 0x1209
+USB_PID = 0x2017
+USB_PRODUCT = "Mini SAM M4"
+USB_MANUFACTURER = "Benjamin Shockley"
+
+QSPI_FLASH_FILESYSTEM = 1
+LONGINT_IMPL = MPZ
+
+CHIP_VARIANT = SAMD51G18A
+CHIP_FAMILY = samd51