diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index f379bce309..9d8e53ea7f 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -95,6 +95,9 @@ CFLAGS += -DCIRCUITPY_BITBANG_APA102=$(CIRCUITPY_BITBANG_APA102)
 CIRCUITPY_BITBANGIO ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_BITBANGIO=$(CIRCUITPY_BITBANGIO)
 
+CIRCUITPY_BITOPS ?= 0
+CFLAGS += -DCIRCUITPY_BITOPS=$(CIRCUITPY_BITOPS)
+
 # _bleio can be supported on most any board via HCI
 CIRCUITPY_BLEIO_HCI ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_BLEIO_HCI=$(CIRCUITPY_BLEIO_HCI)