diff --git a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
index 8dfc741e5a..92374721f8 100644
--- a/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/hallowing_m0_express/mpconfigboard.mk
@@ -16,6 +16,7 @@ LONGINT_IMPL = MPZ
 CIRCUITPY_I2CSLAVE = 0
 CIRCUITPY_FREQUENCYIO = 0
 CIRCUITPY_AUDIOBUSIO = 0
+CIRCUITPY_BITBANGIO = 0
 SUPEROPT_GC = 0
 
 # Include these Python libraries in firmware.