diff --git a/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk b/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk
index 6db1a3c93a..e502f6b569 100644
--- a/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/matrixportal_m4/mpconfigboard.mk
@@ -13,6 +13,7 @@ LONGINT_IMPL = MPZ
 CIRCUITPY_LTO_PARTITION = one
 
 CIRCUITPY_AESIO = 0
+CIRCUITPY_FLOPPYIO = 0
 CIRCUITPY_GIFIO = 0
 CIRCUITPY_ONEWIREIO = 0
 CIRCUITPY_PARALLELDISPLAY = 0